California · Nonprofit
CONTRA COSTA COUNTY HISTORICAL SOCIETY INC
CONTRA COSTA COUNTY HISTORICAL SOCIETY INC (California) receives grants from 3 organizations whose IRS filings report $50,271 to it, the largest being Dean and Margaret Lesher Foundation ($30,000). 2 of them have funded it in more than one year.
- Revenue FY2025
- $204k
- Funders on record
- 3
- Grants received
- $50k
- Net assets
- $662k
What Contra Costa County Historical Society Inc does
Mission
To preserve, protect, and provide public access to records and heritage of Contra Costa County
As stated on its FY2025 Form 990.
Programs
Essay Contest - History of Contra Costa County General History, Women in Contra Costa History, Minorities in Contra Costa History
$900 spent$1,600 earned by the program31% of program spendingContra Costa County History Fair - Diablo Valley College Venue presenting County Historical Society presentations with student participation
$900 spent$1,600 earned by the program31% of program spendingAuthor in the Archives - Presentation on Port Chicago explosion by Dean McLeod
$900 spent$1,600 earned by the program31% of program spendingMiscellaneous programs throughout the year such as street fairs
$243 spent$299 earned by the program8% of program spending
The 4 programs described on its FY2025 Form 990, listed largest first by expense. Program spending in total: $2,943.
The organization over time
Each line starts at 100 in 2020, so what you read is the shape rather than the size: 150 means half as much again as 2020, 50 means half. The number beside each label in the key is where it ended.
Balance sheet
Total assets and total liabilities at each year end, in dollars. The largest one-year move in total assets was 2020 to 2021, from $281k to $416k (+48%).
How it's funded, over time
Each bar is one year's revenue split into where it came from, and every bar is the same height — these are shares, not amounts, so a year that raised twice as much looks the same size. Hover a bar for the split.
Government-grant reliance: 2020 27% · 2021 21% · 2022 19% · 2023 30% · 2024 30% · 2025 32%. Grants only. Government contracts and fees sit inside program revenue.
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 1 of the last 6 reported years ran a deficit.
reserve
Leadership and staff
The officers, directors, trustees and key employees listed on each return. Joined and no longer listed compare each filing with the year before, matching people by surname and first initial; a year after a gap, or a roster under three people, has no comparison.
Chief executive
Patricia L Davis
Executive Director
As listed on its FY2025 Form 990.
Who funds it, year by year
2020 → 2023: the base broadened from 1 funder to 2 funders, grant income rose $42 → $15k.
1 of 3 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 1% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.
From the IRS filings of CONTRA COSTA COUNTY HISTORICAL SOCIETY INC’s funders (the co-funder graph). Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How concentrated its funding is
CONTRA COSTA COUNTY HISTORICAL SOCIETY INC leans on a few funders — its largest provides 60% of grant income and the top three 100%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
Largest funder’s share by year: 2020 100% · 2021 100% · 2022 99% · 2023 100% — broadly stable.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Where its funders are
100% of CONTRA COSTA COUNTY HISTORICAL SOCIETY INC's grant income comes from California funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $271 arriving through sponsors registered in 1 state is excluded from the map and the split above: a sponsor holds money on a donor’s behalf, so its registered address would place those dollars somewhere no donor need ever have been. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Organizations like CONTRA COSTA COUNTY HISTORICAL SOCIETY INC
Organizations whose mission and program text most resemble this one, by semantic similarity over every organization in the US filings — the closest peers, and often the clearest route to shared or prospective funders.
In California
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
2% of spending goes to programs.
Governance
Public support
98%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 1 state
Screen this organization
A dated, signed PDF of the compliance screen for CONTRA COSTA COUNTY HISTORICAL SOCIETY INC: IRS status (Business Master File, Publication 78, auto-revocation), the OFAC sanctions lists, the Internal Revenue Bulletin, and California registration, with the Rev. Proc. 2018-32 §8.01 reliance elements stated element by element. Generated from the current files at the moment you download it.
Screens are triage, not determinations; a source that cannot be read reports not screened, never clear. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds CONTRA COSTA COUNTY HISTORICAL SOCIETY INC?
- CONTRA COSTA COUNTY HISTORICAL SOCIETY INC (California) receives grants from 3 organizations whose IRS filings report $50,271 to it, the largest being Dean and Margaret Lesher Foundation ($30,000). 2 of them have funded it in more than one year.
- How many funders does CONTRA COSTA COUNTY HISTORICAL SOCIETY INC have?
- IRS filings report 3 organizations giving $50,271 in grants to CONTRA COSTA COUNTY HISTORICAL SOCIETY INC, 2 of which have funded it in more than one year.
- Who is the largest funder of CONTRA COSTA COUNTY HISTORICAL SOCIETY INC?
- Dean and Margaret Lesher Foundation is the largest funder on record, with $30,000 in grants. The full list of funders is on this page.
- How can an organization like CONTRA COSTA COUNTY HISTORICAL SOCIETY INC find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in California. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
Play a game about who funds Contra Costa County Historical Society →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2020–2025), and the filings of 3 funders that report grants to it. “On record” means captured in the filings we have parsed — a funder that does not e-file, or whose grant detail is not itemized, will not appear. Filings run roughly 12–24 months behind. Trends on this page end at FY2023, the last fiscal year that has finished arriving; later years are shown and marked, and move no figure. Data on this page was exported October 14, 2026. What this page cannot tell you · view filing