Onondaga County Population

1800–2026

465K

2026 projection

2.2% since 2020 (decrease)

0100K200K300K400K500K18001850190019502000

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Onondaga County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026464,995-1,5890.34%
2025466,584-1,5890.34%
2024468,173-3510.07%
2023468,524-1,3860.29%
2022469,910-1,9190.41%
2021471,829-3,6000.76%
2020475,429+14,5593.16%
2019460,870-1,0200.22%
2018461,890+470.01%
2017461,843-2,2960.49%

Showing 10 of 37 years.

Onondaga County Demographics

39.6median age

Median age

Female40.6 yrs
Male38.5 yrs

Adults

372,575
87,986 seniors (65+) · 24% of adults284,589 other adults

Sex

Female 51.4% · 242,369Male 48.6% · 228,760

Population by age

MaleFemale85+ years, male: 3,78585+ years, female: 7,35680–84 years, male: 4,04980–84 years, female: 5,32975–79 years, male: 6,89075–79 years, female: 9,07370–74 years, male: 11,27870–74 years, female: 12,42565–69 years, male: 13,16265–69 years, female: 14,63960–64 years, male: 16,82860–64 years, female: 17,07855–59 years, male: 14,51955–59 years, female: 16,04750–54 years, male: 13,88850–54 years, female: 14,52945–49 years, male: 12,18145–49 years, female: 12,87840–44 years, male: 13,50640–44 years, female: 13,98035–39 years, male: 15,06235–39 years, female: 15,50930–34 years, male: 15,41130–34 years, female: 15,72625–29 years, male: 14,80925–29 years, female: 15,19420–24 years, male: 15,40320–24 years, female: 15,95515–19 years, male: 16,54415–19 years, female: 16,91910–14 years, male: 15,07310–14 years, female: 13,8655–9 years, male: 13,4845–9 years, female: 13,3670–4 years, male: 12,8880–4 years, female: 12,50085+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45K5K10K10K15K15K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 4,711 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Onondaga County Income

$76,945median household income

Median household income

$76,945

Half of households earn more, half earn less

Median earnings

$54,744

Typical yearly pay for a worker 25 or older.

Poverty rate

13.8%

About 1 in 7 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Onondaga County Marital Status

44% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married44%46%42%
Never married37%40%36%
Divorced11%10%13%
Widowed6%3%8%
Separated2%2%2%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

8 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year