Stephenson County Demographics

A map of Stephenson County's Population by Race

Stephenson County, Illinois had a population of 44,630 in 2020. It was 79.3% White, 9.8% Black, 0.7% Asian, 5.1% Hispanic, 0.6% Native American/Other, and 4.6% Multiracial. This map presents the population of Stephenson County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Stephenson County is the 33rd most populous county of the 102 counties in Illinois.

Stephenson County's White Population

35,405 residents of Stephenson County identify as White, or 79.3%. This makes the White share of the population of Stephenson County considerably larger than the White share of the population of Illinois (58.3% White). Of the 102 counties in Illinois, Stephenson County is ranked #77 in terms of White residents as a share of the population.

Stephenson County is more White than neighboring Winnebago County (64.2% White). Stephenson County is less White than neighboring Green County (91.6% White), Carroll County (87.5% White), Ogle County (83.3% White), and Jo Daviess County (92.4% White).

Stephenson County's Black Population

4,374 residents of Stephenson County identify as Black, or 9.8%. This makes the Black share of the population of Stephenson County roughly similar to the Black share of the population of Illinois (13.9% Black). Of the 102 counties in Illinois, Stephenson County is ranked #17 in terms of Black residents as a share of the population.

Stephenson County is more Black than neighboring Green County (0.5% Black), Carroll County (4.3% Black), Ogle County (1% Black), and Jo Daviess County (0.5% Black). Stephenson County is less Black than neighboring Winnebago County (13.4% Black).

Stephenson County's Asian Population

306 residents of Stephenson County identify as Asian, or 0.7%. This makes the Asian share of the population of Stephenson County slightly less than the Asian share of the population of Illinois (5.8% Asian). Of the 102 counties in Illinois, Stephenson County is ranked #40 in terms of Asian residents as a share of the population.

Stephenson County is more Asian than neighboring Green County (0.5% Asian), Carroll County (0.3% Asian), Ogle County (0.5% Asian), and Jo Daviess County (0.4% Asian). Stephenson County is less Asian than neighboring Winnebago County (2.8% Asian).

Stephenson County's Hispanic Population

2,254 residents of Stephenson County identify as Hispanic, or 5.1%. This makes the Hispanic share of the population of Stephenson County less than the Hispanic share of the population of Illinois (18.2% Hispanic). Of the 102 counties in Illinois, Stephenson County is ranked #32 in terms of Hispanic residents as a share of the population.

Stephenson County is more Hispanic than neighboring Green County (4% Hispanic), Carroll County (4.8% Hispanic), and Jo Daviess County (3.9% Hispanic). Stephenson County is less Hispanic than neighboring Ogle County (11.2% Hispanic), and Winnebago County (14.4% Hispanic).

Stephenson County's Native American/Other Population

246 residents of Stephenson County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.6%. This makes the Native American/Other share of the population of Stephenson County roughly similar to the Native American/Other share of the population of Illinois (0.5% Native American/Other). Of the 102 counties in Illinois, Stephenson County is ranked #20 in terms of Native American/Other residents as a share of the population.

Stephenson County is more Native American/Other than neighboring Green County (0.3% Native American/Other), Carroll County (0.5% Native American/Other), Ogle County (0.3% Native American/Other), and Jo Daviess County (0.4% Native American/Other).

Stephenson County's Multiracial Population

2,045 residents of Stephenson County identify as Multiracial, or 4.6%. This makes the Multiracial share of the population of Stephenson County roughly similar to the Multiracial share of the population of Illinois (3.2% Multiracial). Of the 102 counties in Illinois, Stephenson County is ranked #15 in terms of Multiracial residents as a share of the population.

Stephenson County is more Multiracial than neighboring Green County (3.1% Multiracial), Carroll County (2.5% Multiracial), Ogle County (3.7% Multiracial), and Jo Daviess County (2.4% Multiracial).

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