South Dakota · Nonprofit
MINNILUSA HISTORICAL ASSOCIATION
MINNILUSA HISTORICAL ASSOCIATION (South Dakota) receives grants from 3 organizations whose IRS filings report $42,563 to it, the largest being BLACK HILLS AREA COMMUNITY FOUNDATION ($30,526). 2 of them have funded it in more than one year, and 72% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2025
- $197k
- Funders on record
- 3
- Grants received
- $43k
- Net assets
- $0
What Minnilusa Historical Association does
Mission
Advance the knowledge of pioneer life by managing and maintaining a pioneer museum as a public service, promoting an awareness of the contributions to this area made by our founders and early settlers, collecting, preserving, interepreting and exhibiting historical items and prov
As stated on its FY2025 Form 990.
Program
Minnilusa pioneer museum-the preservation of thousands of historical items for the benefit of the general public.
$2,774,467 spent100% of program spending
The program described on its FY2025 Form 990. Program spending in total: $2,774,467.
The organization over time
Each line starts at 100 in 2017, so what you read is the shape rather than the size: 150 means half as much again as 2017, 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 2024 to 2025, from $2.5M to $0 (−100%).
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: 2022 29% · 2023 8% · 2024 2%. Grants only. Government contracts and fees sit inside program revenue.
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 4 of the last 9 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
Mark Slocum
Executive director
As listed on its FY2025 Form 990.
Who funds it, year by year
2018 → 2023: the base held at 1 funder, grant income fell $6k → $16.
2 of 3 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 72% 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 MINNILUSA HISTORICAL ASSOCIATION’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
MINNILUSA HISTORICAL ASSOCIATION leans on a few funders — its largest provides 72% 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
100% of the income these shares are computed over arrives through pass-through sponsors or from payers whose filings do not say what kind of payment it is. Concentration is still measured over all of it, because the money is real; what it does not support is a claim about how many institutions have chosen to fund MINNILUSA HISTORICAL ASSOCIATION.
Largest funder’s share by year: 2018 100% · 2019 100% · 2020 100% · 2021 100% · 2022 100% · 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
72% of MINNILUSA HISTORICAL ASSOCIATION's grant income arrives through donor-advised or pass-through sponsors, whose addresses record where the money is held rather than where the donor is. Of the $12k that is directly attributable, 100% of it comes from South Dakota funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $31k arriving through sponsors registered in 2 states 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 MINNILUSA HISTORICAL ASSOCIATION
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 South Dakota
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
100% of spending goes to programs.
Governance
Public support
27%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Screen this organization
A dated, signed PDF of the compliance screen for MINNILUSA HISTORICAL ASSOCIATION: 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 MINNILUSA HISTORICAL ASSOCIATION?
- MINNILUSA HISTORICAL ASSOCIATION (South Dakota) receives grants from 3 organizations whose IRS filings report $42,563 to it, the largest being BLACK HILLS AREA COMMUNITY FOUNDATION ($30,526). 2 of them have funded it in more than one year, and 72% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does MINNILUSA HISTORICAL ASSOCIATION have?
- IRS filings report 3 organizations giving $42,563 in grants to MINNILUSA HISTORICAL ASSOCIATION, 2 of which have funded it in more than one year.
- Who is the largest funder of MINNILUSA HISTORICAL ASSOCIATION?
- BLACK HILLS AREA COMMUNITY FOUNDATION is the largest funder on record, with $30,526 in grants. The full list of funders is on this page.
- How can an organization like MINNILUSA HISTORICAL ASSOCIATION find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in South Dakota. 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 Minnilusa Historical Association →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2017–2025), 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