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Tuolumne County Historical Society

EIN 23-7091689 · Sonora, CA

Public records show a registered, tax-exempt organization in good standing.

LegitimacyPassesRegistration and standingFinancial healthGood84 out of 100GovernanceNot ratedThe short tax form does not cover thisImpact evidenceDescribes programsHow well its results are evidenced

What it says it does

The Mission of the Tuolumne County Historical Society is to discover, collect,preserve, and disseminate knowledge about the history of Tuolumne County and the State of California.

Income
$58,258
Spending
$66,873
Reserves
61.9 months of spending
Largest source of income
donations and private grants, 48%

Source: Form 990EZ for the year ending December 31, 2024, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Financial health

Good: 84 out of 100.

  • Reserves

    35 of 35

    Spendable reserves would cover 61.9 months of spending.

  • Debt

    20 of 20

    It owes 0% of what it owns.

  • Living within its means

    4 of 15

    Spending exceeded income by 15% of income.

Source: Form 990EZ for the year ending December 31, 2024, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Governance

This organization files the short tax form, which does not ask about boards, policies or audits. That is normal for a small charity and is not a mark against it.

Source: Form 990EZ for the year ending December 31, 2024, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Impact evidence

Describes programs. Its tax return describes what it does but we have found no measurable results in it.

Programs described in its return (3)
  1. $66,873 spent. OPERATE THE TUOLUMNE COUNTY MUSEUM AND HISTORY RESEARCH CENTER, INCLUDING DEVELOPING AND PROVIDING ACCESS TO EXHIBITS, ARCHIVING AND PRESERVING ARTIFACTS, IMAGES AND WRITINGS, WITH EMPHHASIS ON THE LOCAL COMMUNITY
  2. COMMUNICATE THE IMPORTANT ROLE A OF HISTORY TO OUR LOCAL HERITAGE AND CULTURE THROUGH COMMUNITY OUTREACH PROGRAMS, ESPECIALLY TO OUR YOUTH AND SENIOR DEMOGRAPHICS, THROUGH TOPICAL MONTHLY PUBLIC PRESENTATIONS, AWARDS FOR HISTORIC PRESERVATION AND EDUCATIONAL FIELD TRIPS.
  3. PUBLISH ORIGINAL HISTORIC RESEARCH IN THE "CHISPA," A QUARTERLY PUBLICATION FOCUSING ON LOCAL HISTORIC PEOPLE, EVENTS AND PLACES.

Source: Form 990EZ for the year ending December 31, 2024, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Legitimacy checks

  1. Is it registered with the IRS? Passed.

    Listed in the IRS master file of tax-exempt organizations as a 501(c)(3) charitable organization.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated September 7, 2026.

  2. Has the IRS revoked its tax-exempt status? Passed.

    Not on the IRS automatic revocation list.

    Source: Automatic revocation of exemption list, Internal Revenue Service, file dated September 30, 2026.

  3. Are donations tax-deductible? Passed.

    On the IRS list of organizations eligible to receive tax-deductible contributions.

    Source: Publication 78 data: organizations eligible for tax-deductible contributions, Internal Revenue Service, file dated September 10, 2026.

  4. Is it keeping up with its IRS filings? Passed.

    Most recent return on file covers the year ending December 2024.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated September 7, 2026.

  5. How long has it been tax-exempt? Passed.

    Recognized by the IRS since April 1974.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated September 7, 2026.

  6. Is it in good standing with state regulators? Passed.

    Not on California's list of charities barred from soliciting. Other states are not yet checked.

    Source: May Not Operate or Solicit for Charitable Purposes list, California Attorney General, Registry of Charities and Fundraisers, file dated October 7, 2026.

Ratings and checks are our reading of public records, using the published method. They are not a statement about anyone's honesty. If you work for this organization, you can send corrections or results, confirm you want gifts through Veridonate, or ask to be removed from giving.