jain.com
jain.comCharity Clarity

Charity Clarity › Look up a charity › New York

Ontario County Historical Society

Canandaigua, New York · EIN 16-0768680 · tax-exempt since 1952

B

Charity Clarity grade B (score 75.1 of 100), based on the Form 990 for the year ended October 2025.

Graded against 117,084 unclassified nonprofits with revenue $100K–$500K filing the same form. A = top 10%, B = next 20%, C = middle 40%, D = next 20%, F = bottom 10%.

What goes into the grade

MeasureThis charityScore (0–100)
ReservesMonths of spending covered by unrestricted net assets.11.3 months90
GovernanceBoard independence, key policies and audit, per the 990.74% of practices74
Margin stabilityHow steady the surplus or deficit is year to year.87
Revenue spreadHow much revenue rests on one type of income.83% from one source31
Filing recordOn-time, complete filings, year after year.100%100
Program spendingSelf-reported by the filer.73.1%not scored
Management costsShare of spending.19.2%not scored
Cost to raise $1Fundraising cost per dollar given.$0.07not scored

Scores compare this charity with its peer group; 100 is best. How Charity Clarity rates charities.

Year by year

20172018202020212022202320242025grey: revenue · green: spending
Year endedFormRevenueSpendingSurplusNet assetsMonths of spendingStaffGrade
Oct 2025Form 990$347K$338K$9,089$318K11.35B
Oct 2024Form 990$291K$290K$1,380$309K12.85B
Oct 2023Form 990$309K$293K$16K$308K12.65C
Oct 2022Form 990$213K$283K−$69K$292K12.47C
Oct 2021Form 990$183K$222K−$39K$361K19.56D
Oct 2020Form 990$354K$261K$93K$400K18.46C
Oct 2018Form 990$252K$260K−$8,044$370K17.16C
Oct 2017Form 990$193K$291K−$98K$505K20.86C

From the organisation’s own IRS filings. “Months of spending” is total net assets divided by a month of that year’s spending. A blank grade means that year was not rated.

Read the filings

Every figure here comes from the returns this charity filed with the IRS. These sites show the full returns and more about the organisation: