New York · Nonprofit
MILLBROOK LIBRARY
MILLBROOK LIBRARY (New York) receives grants from 19 organizations whose IRS filings report $1,731,685 to it, the largest being MILLBROOK LIBRARY TRUST ($960,932). 12 of them have funded it in more than one year.
- Revenue FY2025
- $1.0M
- Funders on record
- 19
- Grants received
- $1.7M
- Net assets
- $15M
What Millbrook Library does
Mission
Operate a public library
As stated on its FY2025 Form 990.
Program
Operate a free public library with related programs.
$754,867 spent$2,396 earned by the program100% of program spending
The program described on its FY2025 Form 990. Program spending in total: $754,867.
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. The shaded band is where the middle 50% of its peers' revenue would sit, given their growth.
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 $11M to $12M (+13%).
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: 2017 30% · 2019 33% · 2020 44% · 2021 44% · 2022 59% · 2023 19% · 2024 12% · 2025 35%. Grants only. Government contracts and fees sit inside program revenue.
54% of MILLBROOK LIBRARY’s revenue is contributions — more donation-reliant than the typical peer (48% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 1 of the last 8 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.
Who funds it, year by year
2017 → 2023: the base broadened from 5 funders to 11 funders, grant income rose $98k → $347k.
6 of 19 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 11% 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 MILLBROOK LIBRARY’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
MILLBROOK LIBRARY leans on a few funders — its largest provides 55% of grant income and the top three 78%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
67% 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 MILLBROOK LIBRARY.
Largest funder’s share by year: 2017 76% · 2018 75% · 2019 57% · 2020 31% · 2021 80% · 2022 48% · 2023 69% — diversifying over time.
“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.
How long its funders stay
71% of MILLBROOK LIBRARY's funders are still giving 3 years after their first grant; 63% give in more than one year at all.
Share of funders still giving k years after their first recorded grant, pooled across every acquisition cohort. A funder counts as retained in a year only if it made a grant that year. Measured to FY2023, the last fiscal year that has finished arriving — a funder cannot be counted as lapsed in a year most filers have not reached.
Where its funders are
100% of MILLBROOK LIBRARY's grant income comes from New York funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $195k arriving through sponsors registered in 5 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.
Against its field
MILLBROOK LIBRARY runs a healthier operating margin than half of the 9,398 education nonprofits its size.
this organization peer median middle 50% of peers· 9,398 education nonprofits $1M–$10M, FY2025
Organizations like MILLBROOK LIBRARY
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 New York
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
80% of spending goes to programs.
Governance
Public support
67%
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 MILLBROOK LIBRARY: 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 MILLBROOK LIBRARY?
- MILLBROOK LIBRARY (New York) receives grants from 19 organizations whose IRS filings report $1,731,685 to it, the largest being MILLBROOK LIBRARY TRUST ($960,932). 12 of them have funded it in more than one year.
- How many funders does MILLBROOK LIBRARY have?
- IRS filings report 19 organizations giving $1,731,685 in grants to MILLBROOK LIBRARY, 12 of which have funded it in more than one year.
- Who is the largest funder of MILLBROOK LIBRARY?
- MILLBROOK LIBRARY TRUST is the largest funder on record, with $960,932 in grants. The full list of funders is on this page.
- How can an organization like MILLBROOK LIBRARY find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in New York. 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 Millbrook Library →
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 19 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