Ontario County, New York Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 26th-largest in New York
The population of Ontario County, New York is 112,405 as of the 2023 American Community Survey, making it the 26th-largest county in New York. The median household income is $79,814, the median home value is $202,900, and the median age is 43.9.
The population of Ontario County has grown 4.5% since 2010 (108,183 → 113,012), a +0.31% annualized rate.
112,405
Population
+0.31%
Annual growth
175
People / sq mi
$79,814
Median Income
$202,900
Median Home Value
Ontario County covers 644 sq mi of land at 174.5 people per square mile.
About Ontario County, NY
Educational attainment is the headline number in Ontario County: 37.2% of adults 25 and older have a four-year degree. Ontario County is a county in New York with a population of 112,405. It ranks #26 among counties in New York by population.
Households take in a median $79,814, comfortably near the US median of $78,538. Only 4.9% of residents live in poverty, below the national 12.4%. Homes carry a median value of $202,900, with typical rent around $1,126.
College attainment is above the local norm at 37.2%, above the national 35.0%. About 11.5% of workers primarily work from home, below the national 14.0%, and the average commute runs about 22 minutes each way.
The education numbers are the throughline: a college-heavy population in Ontario County usually coincides with higher incomes and a workforce concentrated in professional and information industries.
Ontario County Population History (2010-2024)
The county of Ontario County had a population of 108,183 in 2010 and 113,012 in 2024, a 4.5% growth over 14 years. The peak was 113,012 in 2024. Average annual growth rate: 0.31%.
113,012
Population (2024)
108,183
Population (2010)
113,012
Peak (2024)
0.31%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 108,183 |
| 2011 | 108,616 |
| 2012 | 108,641 |
| 2013 | 109,081 |
| 2014 | 109,378 |
| 2015 | 109,324 |
| 2016 | 109,348 |
| 2017 | 109,652 |
| 2018 | 109,962 |
| 2019 | 109,984 |
| 2020 | 112,350 |
| 2021 | 112,648 |
| 2022 | 112,509 |
| 2023 | 112,605 |
| 2024 | 113,012 |
Race & Ethnicity
| White | 89.5% |
| Black or African American | 2.3% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.7% |
| Two or More Races | 0.0% |
Age & Sex
43.9
Median Age
50.7%
Female
49.3%
Male
21.6%
Age 65+
Age Distribution
Children (under 15): 15.8% · Seniors (65+): 21.6%
Income & Poverty
| Median household income | $79,814$-4,764 vs state |
| Mean household income | $104,658 |
| Per-capita income | $44,500 |
| Poverty rate | 4.9%-4.9% vs state |
| Unemployment rate | 2.5% |
| Employment-to-population | 58.5% |
Top Industries by Employment
The largest employment sector in Ontario County is professional & business services, accounting for 28.7% of workers.
How residents commute
0.3%
Drive alone
3.3%
Carpool
76.7%
Public transit
11.5%
Work from home
22.4 min
Avg commute
Housing
$202,900$-200,100 vs state
Median home value
$1,126
Median rent
72.8%
Homeownership rate
53,001
Total housing units
90.0%
Occupied
10.0%
Vacant
27.2%
Renter-occupied
Social & access
96.8%
With health insurance
94.5%
With broadband internet
14.8%
Foreign-born
7.1%
Veterans (18+)
15.0%
With a disability
93.4%
Speak language other than English at home
Education
93.3%
High School+
37.2%
Bachelor's+
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County rankings
Frequently Asked Questions
Ontario County, New York has a population of 112,405 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 26th-largest county in New York. Population density is 175 people per square mile.
The population of Ontario County has grown 4.5% since 2010 (108,183 → 113,012), a +0.31% annualized rate.
The median household income in Ontario County, New York is $79,814, with mean (average) household income of $104,658 and per-capita income of $44,500. 4.9% of residents live below the federal poverty level.
In Ontario County, the largest racial and ethnic groups are White (89.5%), Black or African American (2.3%), Hispanic or Latino (0.7%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Ontario County, New York is 43.9 years. Residents are 50.7% female and 49.3% male.
The median home value in Ontario County is $202,900 and median monthly rent is $1,126. 72.8% of occupied housing units are owner-occupied. The county has 53,001 total housing units, 10.0% of which are vacant.
The largest employment sector in Ontario County, New York is professional, scientific, and management services, employing 28.7% of workers. The unemployment rate is 2.5%.
New York is among the largest cities associated with Ontario County, New York, with a population of 8,516,202.
Ontario County, NY Climate
Ontario County, NY has an average annual temperature of 8.4°C (47°F) and receives about 875 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
8.4°C
Avg Temp
875
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -5° / 23° | 48 mm |
| February | -4° / 25° | 45 mm |
| March | 1° / 33° | 58 mm |
| April | 7° / 45° | 75 mm |
| May | 14° / 56° | 78 mm |
| June | 19° / 65° | 92 mm |
| July | 21° / 70° | 78 mm |
| August | 20° / 69° | 87 mm |
| September | 16° / 61° | 92 mm |
| October | 10° / 50° | 78 mm |
| November | 4° / 40° | 81 mm |
| December | -2° / 29° | 63 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Ontario County, NY
The most comfortable months to visit Ontario County, NY are typically July, August and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 27°C high). The coldest is January (near -9°C low). June is usually the wettest month.
Where to stay near Ontario County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.