Onondaga County Demographics

A map of Onondaga County's Population by Race

Onondaga County, New York had a population of 476,516 in 2020. It was 72.9% White, 11.4% Black, 4.2% Asian, 5.6% Hispanic, 1.0% Native American/Other, and 4.9% Multiracial. This map presents the population of Onondaga County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Onondaga County is the 11th most populous county of the 62 counties in New York.

Onondaga County's White Population

347,290 residents of Onondaga County identify as White, or 72.9%. This makes the White share of the population of Onondaga County considerably larger than the White share of the population of New York (52.5% White). Of the 62 counties in New York, Onondaga County is ranked #45 in terms of White residents as a share of the population.

Onondaga County is more White than neighboring Tompkins County (72.6% White). Onondaga County is less White than neighboring Cayuga County (87% White), Cortland County (87.2% White), Oswego County (89.9% White), and Madison County (89.6% White).

Onondaga County's Black Population

54,410 residents of Onondaga County identify as Black, or 11.4%. This makes the Black share of the population of Onondaga County roughly similar to the Black share of the population of New York (13.7% Black). Of the 62 counties in New York, Onondaga County is ranked #9 in terms of Black residents as a share of the population.

Onondaga County is more Black than neighboring Cayuga County (3.6% Black), Cortland County (1.8% Black), Oswego County (1.2% Black), Madison County (1.6% Black), and Tompkins County (4% Black).

Onondaga County's Asian Population

20,119 residents of Onondaga County identify as Asian, or 4.2%. This makes the Asian share of the population of Onondaga County slightly less than the Asian share of the population of New York (9.5% Asian). Of the 62 counties in New York, Onondaga County is ranked #17 in terms of Asian residents as a share of the population.

Onondaga County is more Asian than neighboring Cayuga County (0.5% Asian), Cortland County (2.2% Asian), Oswego County (0.7% Asian), and Madison County (1% Asian). Onondaga County is less Asian than neighboring Tompkins County (9.9% Asian).

Onondaga County's Hispanic Population

26,572 residents of Onondaga County identify as Hispanic, or 5.6%. This makes the Hispanic share of the population of Onondaga County less than the Hispanic share of the population of New York (19.5% Hispanic). Of the 62 counties in New York, Onondaga County is ranked #27 in terms of Hispanic residents as a share of the population.

Onondaga County is more Hispanic than neighboring Cayuga County (3.5% Hispanic), Cortland County (3.5% Hispanic), Oswego County (3.1% Hispanic), and Madison County (2.5% Hispanic). Onondaga County is less Hispanic than neighboring Tompkins County (6.7% Hispanic).

Onondaga County's Native American/Other Population

5,001 residents of Onondaga County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 1.0%. This makes the Native American/Other share of the population of Onondaga County roughly similar to the Native American/Other share of the population of New York (1.3% Native American/Other). Of the 62 counties in New York, Onondaga County is ranked #12 in terms of Native American/Other residents as a share of the population.

Onondaga County is more Native American/Other than neighboring Cayuga County (0.7% Native American/Other), Cortland County (0.7% Native American/Other), Oswego County (0.7% Native American/Other), Madison County (0.9% Native American/Other), and Tompkins County (0.9% Native American/Other).

Onondaga County's Multiracial Population

23,124 residents of Onondaga County identify as Multiracial, or 4.9%. This makes the Multiracial share of the population of Onondaga County roughly similar to the Multiracial share of the population of New York (3.6% Multiracial). Of the 62 counties in New York, Onondaga County is ranked #8 in terms of Multiracial residents as a share of the population.

Onondaga County is more Multiracial than neighboring Cayuga County (4.8% Multiracial), Cortland County (4.7% Multiracial), Oswego County (4.4% Multiracial), and Madison County (4.4% Multiracial). Onondaga County is less Multiracial than neighboring Tompkins County (5.9% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.