Onondaga County, New York Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 11th-largest in New York
The population of Onondaga County, New York is 471,611 as of the 2023 American Community Survey, making it the 11th-largest county in New York. The median household income is $74,740, the median home value is $185,300, and the median age is 39.5.
The population of Onondaga County has grown 0.5% since 2010 (467,549 → 469,812), a +0.03% annualized rate.
471,611
Population
+0.03%
Annual growth
606
People / sq mi
$74,740
Median Income
$185,300
Median Home Value
Onondaga County covers 778 sq mi of land at 605.9 people per square mile.
About Onondaga County, NY
Onondaga County stands apart on settlement density — it is among the most densely settled of US counties, at roughly 606 people per square mile. Onondaga County is a county in New York with a population of 471,611. It ranks #11 among counties in New York by population.
Households take in a median $74,740, comfortably near the US median of $78,538. About 9.5% of residents live below the federal poverty level, below the national 12.4%. Median home value is $185,300, with typical rent around $1,067.
Degree attainment is near the top of the range for US counties: 38.1% of adults 25+ hold a bachelor’s, above the 35.0% national rate. About 11.4% of workers primarily work from home, below the national 14.0%, and the average commute runs about 20 minutes each way.
That density explains much of the rest of the profile in Onondaga County: denser places lean toward renting, shorter commutes by transit, and a younger working-age mix.
Onondaga County Population History (2010-2024)
The county of Onondaga County had a population of 467,549 in 2010 and 469,812 in 2024, a 0.5% growth over 14 years. The peak was 474,218 in 2020. Average annual growth rate: 0.04%.
469,812
Population (2024)
467,549
Population (2010)
474,218
Peak (2020)
0.04%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 467,549 |
| 2011 | 467,679 |
| 2012 | 467,138 |
| 2013 | 468,302 |
| 2014 | 467,472 |
| 2015 | 466,320 |
| 2016 | 464,139 |
| 2017 | 461,843 |
| 2018 | 461,890 |
| 2019 | 460,870 |
| 2020 | 474,218 |
| 2021 | 471,959 |
| 2022 | 470,432 |
| 2023 | 469,226 |
| 2024 | 469,812 |
Race & Ethnicity
| White | 75.9% |
| Black or African American | 10.8% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.7% |
| Two or More Races | 0.0% |
Age & Sex
39.5
Median Age
51.5%
Female
48.5%
Male
18.2%
Age 65+
Age Distribution
Children (under 15): 17.4% · Seniors (65+): 18.2%
Income & Poverty
| Median household income | $74,740$-9,838 vs state |
| Mean household income | $99,134 |
| Per-capita income | $41,538 |
| Poverty rate | 9.5%-0.3% vs state |
| Unemployment rate | 3.2% |
| Employment-to-population | 59.6% |
Top Industries by Employment
The largest employment sector in Onondaga County is professional & business services, accounting for 32.5% of workers.
How residents commute
2.1%
Drive alone
3.7%
Carpool
72.9%
Public transit
11.4%
Work from home
20.3 min
Avg commute
Housing
$185,300$-217,700 vs state
Median home value
$1,067
Median rent
65.7%
Homeownership rate
211,683
Total housing units
92.1%
Occupied
7.9%
Vacant
34.3%
Renter-occupied
Social & access
96.7%
With health insurance
94.1%
With broadband internet
15.3%
Foreign-born
6.0%
Veterans (18+)
13.8%
With a disability
89.0%
Speak language other than English at home
Education
91.7%
High School+
38.1%
Bachelor's+
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County rankings
Common questions about Onondaga County, NY
Frequently Asked Questions
Onondaga County, New York has a population of 471,611 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 11th-largest county in New York. Population density is 606 people per square mile.
The population of Onondaga County has grown 0.5% since 2010 (467,549 → 469,812), a +0.03% annualized rate.
The median household income in Onondaga County, New York is $74,740, with mean (average) household income of $99,134 and per-capita income of $41,538. 9.5% of residents live below the federal poverty level.
In Onondaga County, the largest racial and ethnic groups are White (75.9%), Black or African American (10.8%), Hispanic or Latino (1.7%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Onondaga County, New York is 39.5 years. Residents are 51.5% female and 48.5% male.
The median home value in Onondaga County is $185,300 and median monthly rent is $1,067. 65.7% of occupied housing units are owner-occupied. The county has 211,683 total housing units, 7.9% of which are vacant.
The largest employment sector in Onondaga County, New York is professional, scientific, and management services, employing 32.5% of workers. The unemployment rate is 3.2%.
New York is among the largest cities associated with Onondaga County, New York, with a population of 8,516,202.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.