Onondaga County, NY Population

Overview

474,621

Total Population

39.3

Median age

51.48%

Female population %

94.3:100

Gender ratio (M:F)

60-64 years

Largest age group

53.2

Total dependency ratio

White

Largest racial group

24,689

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Onondaga County's population is old compared to the rest of the country:

The median age in Onondaga County is 39.3, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Onondaga County's population under 18 was 21.38%, compared to the 22.51% nationwide.
Onondaga County's elderly or the senior population (over 65 age) was 17.15% as compared to 16.04% nationwide.
Of the total population in Onondaga County, 17.57% were under the age of 15, 20.44% aged 15 to 29, 44.83% aged 30 to 64, 14.74% aged 65 to 84, and 2.41% were 85 years of age and older.

There are 14,017 more females than males in Onondaga County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 51.48% females and 48.52% males in Onondaga County, NY.
The Onondaga County, NY gender ratio is 94.3:100 i.e. 94.3 men to 100 women (0.943).
For male population, the largest age group is 60-64 years with a population of 17,136.
For the female population, the largest age group is 60-64 years with a population of 18,166.

Onondaga County's population has become increasingly diverse:

Racial distribution of Onondaga County population: 78.04% are White, 10.92% are Black or African American, 0.42% are American Indian and Alaska Native, 3.89% are Asian, 0.04% are Native Hawaiian and other Pacific Islander, 1.36% are some other race and 5.32% are multiracial.
Onondaga County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 24,689 is Hispanic or Latino (of any race), and 449,932 (94.80% of the total population) is Non-Hispanic.
The largest racial group in Onondaga County is White with a population of 370,405 (78.04% of the total population).

Onondaga County's population has already reached its peak and is showing a trend of decline:

The peak population was 474,316 in the year 2020
From 2000 to 2010, Onondaga County's population increased by 9,661 (2.11%), as compared to the national growth of 9.63%.
From 2010 to 2020, Onondaga County's population increased by 6,767 (1.45%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Onondaga County's population was lowest in year 2007 at 455,043.