Northern Mariposa County History Center

Coulterville, CA
Tax-exempt since June 1979
EIN: 94-2578193

Receive an email when new data is available for this organization.

Type of Nonprofit

Designated as a 501(c)(3) Organizations for any of the following purposes: religious, educational, charitable, scientific, literary, testing for public safety, fostering national or international amateur sports competition (as long as it doesn't provide athletic facilities or equipment), or the prevention of cruelty to children or animals.

Category: Arts, Culture and Humanities / History Museums (NTEE)

Donations to this organization are tax deductible.

Revenue

$75.9k (2024)

Expenses

$65.8k (2024)

Total Assets

$625k (2024)

Total Liabilities

$1.11k (2024)

Source: Form 990 tax filings from 2010 to 2024

Tax Filings by Year

Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS. Nonprofit Explorer has IRS digitized Form 990 data for filings processed in 2012 and later. If this organization filed an amended return, it may not be reflected below. Duplicate download links may indicate a resubmission or amendment to this organization's original return. Form 990 data is from the IRS.

Fiscal Year Ending Dec.
2024

Revenue

$75,850

Expenses

$65,771

Net Income

$10,079

Net Assets

$624,090

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$30,308	40.0%
Program Services	$0
Investment Income	$29,374	38.7%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	$16,168	21.3%
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$5,605	8.5%

Assets/Debt
Total Assets	$625,202
Total Liabilities	$1,112
Net Assets	$624,090

Compensation

Key Employees and Officers	Compensation	Related	Other
Willow Polson (President)	$0	$0	$0
Lynn Breshears (Vice President)	$0	$0	$0
Andrew Hoty (Secretary)	$0	$0	$0
Dawn Huston (Director)	$0	$0	$0
Erica Wolfsen (Director)	$0	$0	$0
Jo Mottoa Owen (Director)	$0	$0	$0
Haylee Ayers (Director)	$0	$0	$0
Amber Allen (Director)	$0	$0	$0
Erica Wolfsen (Director)	$0	$0	$0
Jo Motta Owen (Director)	$0	$0	$0
Lonny Baltz (Director)	$0	$0	$0
Dyanne Loyola (Treasurer)	$0	$0	$0

+ View more people

990

Filed on June 19, 2025

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing

Schedules ▼

XML

Fiscal Year Ending Dec.
2023

Revenue

$53,071

Expenses

$46,961

Net Income

$6,110

Net Assets

$614,012

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$37,056	69.8%
Program Services	$2,850	5.4%
Investment Income	$10,480	19.7%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	$11,250	21.2%
Sales of Assets	-$8,565
Net Inventory Sales	$0
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$0

Assets/Debt
Total Assets	$614,239
Total Liabilities	$227
Net Assets	$614,012

Compensation

Key Employees and Officers	Compensation	Related	Other
Willow Polson (President)	$0	$0	$0
Lynn Breshears (Vice President)	$0	$0	$0
Andrew Hoyt (Secretary)	$0	$0	$0
Dawn Huston (Director)	$0	$0	$0
Erica Wolfsen (Director)	$0	$0	$0
Jo Motta Owen (Director)	$0	$0	$0
Dyanne Loyola (Treasurer)	$0	$0	$0

+ View more people

990

Filed on June 3, 2024

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing

Schedules ▼

XML

Fiscal Year Ending Dec.
2022

Revenue

$39,775

Expenses

$55,782

Net Income

-$16,007

Net Assets

$559,047

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$18,940	47.6%
Program Services	$857	2.2%
Investment Income	$8,390	21.1%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	$12,929	32.5%
Sales of Assets	-$1,341
Net Inventory Sales	$0
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$0

Assets/Debt
Total Assets	$559,047
Total Liabilities	$0
Net Assets	$559,047

Compensation

Key Employees and Officers	Compensation	Related	Other
Willow Polson (President)	$0	$0	$0
Lynn Breshears (Vice President)	$0	$0	$0
Andrew Hoyt (Secretary)	$0	$0	$0
Dyanne Loyola (Treasurer)	$0	$0	$0

+ View more people

990

Filed on April 15, 2023

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing

Schedules ▼

XML

Fiscal Year Ending Dec.
2021

Revenue

$152,313

Expenses

$57,899

Net Income

$94,414

Net Assets

$620,355

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$128,960	84.7%
Program Services	$0
Investment Income	$9,923	6.5%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	$9,432	6.2%
Sales of Assets	$3,998	2.6%
Net Inventory Sales	$0
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$0

Assets/Debt
Total Assets	$620,365
Total Liabilities	$10
Net Assets	$620,355

Compensation

Key Employees and Officers	Compensation	Related	Other
Dawn Huston (Secretary)	$0	$0	$0
Steven Bacus (Vice President)	$0	$0	$0
Judy Stafford (President)	$0	$0	$0

990

Filed on June 1, 2022

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing

Schedules ▼

XML

Fiscal Year Ending Dec.
2020

Revenue

$15,632

Expenses

$30,562

Net Income

-$14,930

Net Assets

$522,256

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$7,992	51.1%
Program Services	$0
Investment Income	$8,420	53.9%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	-$738
Sales of Assets	-$42
Net Inventory Sales	$0
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$0

Assets/Debt
Total Assets	$522,326
Total Liabilities	$70
Net Assets	$522,256

Compensation

Key Employees and Officers	Compensation	Related	Other
Dawn Huston (Secretary)	$0	$0	$0
Steven Bacus (Vice President)	$0	$0	$0
Judy Stafford (President)	$0	$0	$0

990

Filed on July 7, 2021

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing

Schedules ▼

XML

Fiscal Year Ending Dec.
2019

Revenue

$29,809

Expenses

$31,536

Net Income

-$1,727

Net Assets

$517,743

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$14,308	48.0%
Program Services	$0
Investment Income	$7,314	24.5%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	$8,798	29.5%
Sales of Assets	-$611
Net Inventory Sales	$0
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$0

Assets/Debt
Total Assets	$517,848
Total Liabilities	$105
Net Assets	$517,743

Compensation

Key Employees and Officers	Compensation	Related	Other
Marilyn Wynn (Secretary)	$0	$0	$0
Judy Burden (Board Member)	$0	$0	$0
Steven Bacus (Vice President)	$0	$0	$0
Ben Starr (Board Member)	$0	$0	$0
Maryann Huff (President)	$0	$0	$0
Judy Stafford (Treasurer)	$0	$0	$0
Steve Holmes (Board Member)	$0	$0	$0

+ View more people

990

Filed on June 12, 2020

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing

Schedules ▼

PDF XML

Fiscal Year Ending Dec.
2018

Revenue

$55,912

Expenses

$32,311

Net Income

$23,601

Net Assets

$496,816

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$18,785	33.6%
Program Services	$0
Investment Income	$13,765	24.6%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	$19,955	35.7%
Sales of Assets	$3,407	6.1%
Net Inventory Sales	$0
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$0

Assets/Debt
Total Assets	$496,964
Total Liabilities	$148
Net Assets	$496,816

Compensation

Key Employees and Officers	Compensation	Related	Other
Marilyn Wynn (Secretary)	$0	$0	$0
Judy Burden (Board Member)	$0	$0	$0
Steven Bacus (Vice President)	$0	$0	$0
Ben Starr (Board Member)	$0	$0	$0
Maryann Huff (President)	$0	$0	$0
Judy Stafford (Treasurer)	$0	$0	$0
Steve Holmes (Board Member)	$0	$0	$0

+ View more people

990

Filed on July 12, 2019

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing

Schedules ▼

PDF XML

Fiscal Year Ending Dec.
2017

Revenue

$39,182

Expenses

$25,936

Net Income

$13,246

Net Assets

$495,075

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$13,470	34.4%
Program Services	$0
Investment Income	$9,017	23.0%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	$15,031	38.4%
Sales of Assets	$1,664	4.2%
Net Inventory Sales	$0
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$0

Assets/Debt
Total Assets	$495,176
Total Liabilities	$101
Net Assets	$495,075

Compensation

Key Employees and Officers	Compensation	Related	Other
Marilyn Wynn (Secretary)	$0	$0	$0
Sandy Richesin (Board Member)	$0	$0	$0
Steven Bacus (Board Member)	$0	$0	$0
Susan Bramson (Vice President)	$0	$0	$0
Maryann Huff (President)	$0	$0	$0
Dana Brown (Treasurer)	$0	$0	$0

+ View more people

990

Filed on Nov. 14, 2018

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing

Schedules ▼

PDF XML

Fiscal Year Ending Dec.
2016

Revenue

$44,855

Expenses

$37,459

Net Income

$7,396

Net Assets

$475,135

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$0
Program Services	$39,481	88.0%
Investment Income	$7,678	17.1%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	$0
Sales of Assets	$0
Net Inventory Sales	-$2,304
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$0

Assets/Debt
Total Assets	$475,135
Total Liabilities	$0
Net Assets	$475,135

Compensation

Key Employees and Officers	Compensation	Related	Other
Jessica Mimnaugh (Secretary)	$0	$0	$0
Sandy Richesin (Secretary)	$0	$0	$0
Mary Ann Huff (Director)	$0	$0	$0
Angel Fischr (Director)	$0	$0	$0
Gearge Partan (President)	$0	$0	$0
Dana Brown (Treasurer)	$0	$0	$0

+ View more people

990

Filed on May 8, 2017

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing

Schedules ▼

PDF XML

Fiscal Year Ending Dec.
2015

Revenue

$39,135

Expenses

$35,329

Net Income

$3,806

Net Assets

$467,739

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$0
Program Services	$32,645	83.4%
Investment Income	$4,093	10.5%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	$0
Sales of Assets	$0
Net Inventory Sales	$2,397	6.1%
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$0

Assets/Debt
Total Assets	$467,739
Total Liabilities	$0
Net Assets	$467,739

Compensation

Key Employees and Officers	Compensation	Related	Other
Mark Becker (Director)	$0	$0	$0
Bill Lane (Director)	$0	$0	$0
Rex Wahman (Director)	$0	$0	$0
Susan Bramson (President)	$0	$0	$0
William Lane (Vice President)	$0	$0	$0
Pamela Henderson (Secretary)	$0	$0	$0
Doris Quinones (Treasurer)	$0	$0	$0

+ View more people

990

Filed on July 25, 2016

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing

Schedules ▼

PDF XML

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2014

Revenue

$27,781

Expenses

$31,452

Net Income

-$3,671

Net Assets

$463,933

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$7,000	25.2%
Program Services	$14,546	52.4%
Investment Income	$5,372	19.3%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	$420	1.5%
Sales of Assets	$0
Net Inventory Sales	$443	1.6%
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$0

Assets/Debt
Total Assets	$463,933
Total Liabilities	$0
Net Assets	$463,933

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2013

Revenue

$29,661

Expenses

$33,569

Net Income

-$3,908

Net Assets

$465,910

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$8,831	29.8%
Program Services	$14,872	50.1%
Investment Income	$4,699	15.8%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	$0
Sales of Assets	$0
Net Inventory Sales	$1,259	4.2%
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$0

Assets/Debt
Total Assets	$465,910
Total Liabilities	$0
Net Assets	$465,910

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2012

Revenue

$59,666

Expenses

$52,982

Net Income

$6,684

Net Assets

$383,839

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$60,133	> 100%
Program Services	$0
Investment Income	$5,139	8.6%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	-$6,573
Sales of Assets	$0
Net Inventory Sales	$967	1.6%
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$11,919	22.5%

Assets/Debt
Total Assets	$383,839
Total Liabilities	$0
Net Assets	$383,839

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2011

Revenue

$67,427

Expenses

$68,980

Net Income

-$1,553

Net Assets

$381,889

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$60,154	89.2%
Program Services	$0
Investment Income	$7,273	10.8%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	$0
Sales of Assets	$0
Net Inventory Sales	$0
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$0
Professional Fundraising Fees	$0
Other Salaries and Wages	$19,496	28.3%

Assets/Debt
Total Assets	$381,889
Total Liabilities	$0
Net Assets	$381,889

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

PDF (2 of 2)

Fiscal Year Ending Dec.
2010

Revenue

$43,954

Expenses

$50,784

Net Income

-$6,830

Net Assets

$580,729

Notable Sources of Revenue		Percent of Total Revenue
Contributions	$28,787	65.5%
Program Services	$0
Investment Income	$6,807	15.5%
Bond Proceeds	$0
Royalties	$0
Rental Property Income	$0
Net Fundraising	$5,544	12.6%
Sales of Assets	$0
Net Inventory Sales	$1,251	2.8%
Other Revenue	$0

Notable Expenses		Percent of Total Expenses
Executive Compensation	$19,411	38.2%
Professional Fundraising Fees	$0
Other Salaries and Wages	$0

Assets/Debt
Total Assets	$580,729
Total Liabilities	$0
Net Assets	$580,729

990

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

PDF (2 of 4) PDF (3 of 4) PDF (4 of 4)

Fiscal Year Ending Dec.
2009

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

Primary tax return for a nonprofit’s activities, finances, and governance

Primary tax return for a nonprofit’s activities, finances, and governance

PDF

About This Data

What Is This Data?

Nonprofit Explorer includes summary data for nonprofit tax returns and full Form 990 documents, in both PDF and digital formats.

The summary data contains information processed by the IRS during the 2012-2019 calendar years; this generally consists of filings for the 2011-2018 fiscal years, but may include older records. This data release includes only a subset of what can be found in the full Form 990s.

In addition to the raw summary data, we link to PDFs and digital copies of full Form 990 documents wherever possible. This consists of separate releases by the IRS of Form 990 documents processed by the agency, which we update regularly.

We also link to copies of audits nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year since 2016. These audits are copied from the Federal Audit Clearinghouse.

Which Organizations Are Here?

Every organization that has been recognized as tax exempt by the IRS has to file Form 990 every year, unless they make less than $200,000 in revenue and have less than $500,000 in assets, in which case they have to file form 990-EZ. Organizations making less than $50,000 don’t have to file either form but do have to let the IRS they’re still in business via a Form 990N "e-Postcard."

Nonprofit Explorer has organizations claiming tax exemption in each of the 27 subsections of the 501(c) section of the tax code, and which have filed a Form 990, Form 990EZ or Form 990PF. Taxable trusts and private foundations that are required to file a form 990PF are also included. Small organizations filing a Form 990N "e-Postcard" are not included in this data.

Types of Nonprofits

There are 27 nonprofit designations based on the numbered subsections of section 501(c) of the tax code. See the list »

Get the Data

For those interested in acquiring the original data from the source, here’s where our data comes from:

Raw filing data. Includes EINs and summary financials as structured data.
Exempt Organization profiles. Includes organization names, addresses, etc. You can merge this with the raw filing data using EIN numbers.
Form 990 documents. Prior to 2017, these documents were obtained and processed by Public.Resource.org and ProPublica. Bulk PDF downloads since 2017 are available from the IRS.
Form 990 documents as XML files. Includes complete filing data (financial details, names of officers, tax schedules, etc.) in machine-readable format. Only available for electronically filed documents. Electronic data released prior to October 2021 is also available through Amazon Web Services.
Audits. PDFs of single or program-specific audits for nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year. Available for fiscal year 2015 and later.

API

The data powering this website is available programmatically, via an API. Read the API documentation »

See an issue with the data?

Nonprofit Explorer

Browse millions of annual returns filed by tax-exempt organizations with ProPublica’s Nonprofit Explorer. See details like executive compensation, revenue, expenses and more. Search for an organization or a person, or search the full text of filings.

By Andrea Suozzo, Alec Glassford, Ash Ngu and Brandon Roberts.

Design by Jeff Frankl. Additional development by Ken Schwencke, Mike Tigas, and Sisi Wei.

E-file viewer adapted from IRS e-File Viewer by Ben Getson. Code for scraping audit documents adapated from Govwiki.

Updated December 22, 2025

Northern Mariposa County History Center

Organization summary

Type of Nonprofit

Summary charts: organization finances over time

Revenue $75.9k (2024)

Expenses $65.8k (2024)

Total Assets $625k (2024)

Total Liabilities $1.11k (2024)

Tax Filings by Year

Fiscal Year Ending Dec. 2024

Extracted Financial Data

Extracted Financial Data from Form 990

Compensation

Document Links

990

Fiscal Year Ending Dec. 2023

Extracted Financial Data

Extracted Financial Data from Form 990

Compensation

Document Links

990

Fiscal Year Ending Dec. 2022

Extracted Financial Data

Extracted Financial Data from Form 990

Compensation

Document Links

990

Fiscal Year Ending Dec. 2021

Extracted Financial Data

Extracted Financial Data from Form 990

Compensation

Document Links

990

Fiscal Year Ending Dec. 2020

Extracted Financial Data

Extracted Financial Data from Form 990

Compensation

Document Links

990

Fiscal Year Ending Dec. 2019

Extracted Financial Data

Extracted Financial Data from Form 990

Compensation

Document Links

990

Fiscal Year Ending Dec. 2018

Extracted Financial Data

Extracted Financial Data from Form 990

Compensation

Document Links

990

Fiscal Year Ending Dec. 2017

Extracted Financial Data

Extracted Financial Data from Form 990

Compensation

Document Links

990

Fiscal Year Ending Dec. 2016

Extracted Financial Data

Extracted Financial Data from Form 990

Compensation

Document Links

990

Fiscal Year Ending Dec. 2015

Extracted Financial Data

Extracted Financial Data from Form 990

Compensation

Document Links

990

990-T

Fiscal Year Ending Dec. 2014

Extracted Financial Data

Extracted Financial Data from Form 990

Document Links

990

990-T

Fiscal Year Ending Dec. 2013

Extracted Financial Data

Extracted Financial Data from Form 990

Document Links

Revenue

$75.9k (2024)

Expenses

$65.8k (2024)

Total Assets

$625k (2024)

Total Liabilities

$1.11k (2024)

Fiscal Year Ending Dec.
2024

Fiscal Year Ending Dec.
2023

Fiscal Year Ending Dec.
2022

Fiscal Year Ending Dec.
2021

Fiscal Year Ending Dec.
2020

Fiscal Year Ending Dec.
2019

Fiscal Year Ending Dec.
2018

Fiscal Year Ending Dec.
2017

Fiscal Year Ending Dec.
2016

Fiscal Year Ending Dec.
2015

Fiscal Year Ending Dec.
2014

Fiscal Year Ending Dec.
2013

Fiscal Year Ending Dec.
2012

Fiscal Year Ending Dec.
2011

Fiscal Year Ending Dec.
2010

Fiscal Year Ending Dec.
2009

Fiscal Year Ending Dec.
2008

Fiscal Year Ending Dec.
2007

Fiscal Year Ending Dec.
2006

Fiscal Year Ending Dec.
2005

Fiscal Year Ending Dec.
2004

Fiscal Year Ending Dec.
2003

Fiscal Year Ending Dec.
2002

Fiscal Year Ending Dec.
2001