Sangamon County Demographics

A map of Sangamon County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	150,779	150,467	77.3%	76.6%
Black	24,441	25,686	12.5%	13.1%
Multiracial	8,473	9,450	4.3%	4.8%
Hispanic	5,721	5,309	2.9%	2.7%
Asian	4,401	4,300	2.3%	2.2%
Native American/Other	1,132	1,131	0.6%	0.6%

Sangamon County, Illinois has an estimated population of 194,947, a less than 1% change from the 196,343 recorded in the 2020 Census. The population is 77.3% White, 12.5% Black, 4.3% Multiracial, 2.9% Hispanic, 2.3% Asian, and 0.6% Native American/Other. This demographic dot map shows the population of Sangamon County, with one dot drawn for each person counted by the Census, color-coded by race.

Sangamon has become slightly less racially diverse since the 2020 Census. It is considerably less diverse than Illinois overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Sangamon County, that probability was 39.2% in 2020 and 38.3% in the most recent ACS estimates.

Sangamon County is ranked the 11th most populous county in Illinois, out of 102 counties. Sangamon County was ranked the 11th most populous county in the 2020 Census.

Sangamon County's White Population

150,779 residents of Sangamon County, or 77.3% of the population, identify as White. The share of White residents in Sangamon County is significantly higher than in Illinois overall, where 58.1% of the population is White. Sangamon County ranks 80th statewide in terms of White residents as a share of the population, out of 102 counties.

Since the 2020 Census, Sangamon County's White population has remained roughly the same. White residents' share of Sangamon County's population has increased from 76.6% to 77.3%.

Sangamon County is less White than neighboring Menard County (94.8% White), Christian County (91% White), Logan County (85.9% White), Morgan County (87.2% White), and Mason County (94.2% White).

Sangamon County's Black Population

24,441 residents of Sangamon County, or 12.5% of the population, identify as Black. The share of Black residents in Sangamon County is comparable to the share in Illinois overall, where 13.3% of the population is Black. Sangamon County ranks 13th statewide in terms of Black residents as a share of the population, out of 102 counties.

Since the 2020 Census, Sangamon County's Black population has declined by an estimated 4.8%. Black residents' share of Sangamon County's population has decreased from 13.1% to 12.5%.

Sangamon County is more Black than neighboring Menard County (0.5% Black), Christian County (2.1% Black), Logan County (5.4% Black), Morgan County (4.9% Black), and Mason County (0.5% Black).

Sangamon County's Asian Population

4,401 residents of Sangamon County, or 2.3% of the population, identify as Asian. The share of Asian residents in Sangamon County is slightly lower than in Illinois overall, where 5.9% of the population is Asian. Sangamon County ranks 16th statewide in terms of Asian residents as a share of the population, out of 102 counties.

Since the 2020 Census, Sangamon County's Asian population has grown by an estimated 2.3%. Asian residents' share of Sangamon County's population has remained roughly unchanged at 2.3%.

Sangamon County is more Asian than neighboring Menard County (0.3% Asian), Christian County (0.7% Asian), Logan County (0.5% Asian), Morgan County (0.8% Asian), and Mason County (0.4% Asian).

Sangamon County's Hispanic Population

5,721 residents of Sangamon County, or 2.9% of the population, identify as Hispanic. The share of Hispanic residents in Sangamon County is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Sangamon County ranks 55th statewide in terms of Hispanic residents as a share of the population, out of 102 counties.

Since the 2020 Census, Sangamon County's Hispanic population has grown by an estimated 7.8%. Hispanic residents' share of Sangamon County's population has remained roughly unchanged at 2.9%.

Sangamon County is more Hispanic than neighboring Menard County (1.7% Hispanic), and Mason County (1.6% Hispanic). Sangamon County is less Hispanic than neighboring Christian County (3.3% Hispanic), and Logan County (3.5% Hispanic).

Sangamon County's Native American/Other Population

1,132 residents of Sangamon County, or 0.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Sangamon County is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Sangamon County ranks 17th statewide in terms of Native American/Other residents as a share of the population, out of 102 counties.

Since the 2020 Census, Sangamon County's Native American/Other population has remained roughly the same. Native American/Other residents' share of Sangamon County's population has remained roughly unchanged at 0.6%.

Sangamon County is more Native American/Other than neighboring Menard County (0% Native American/Other), Christian County (0.4% Native American/Other), Logan County (0.1% Native American/Other), Morgan County (0.2% Native American/Other), and Mason County (0.2% Native American/Other).

Sangamon County's Multiracial Population

8,473 residents of Sangamon County, or 4.3% of the population, identify as Multiracial. The share of Multiracial residents in Sangamon County is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Sangamon County ranks 8th statewide in terms of Multiracial residents as a share of the population, out of 102 counties.

Since the 2020 Census, Sangamon County's Multiracial population has declined by an estimated 10.3%. Multiracial residents' share of Sangamon County's population has decreased from 4.8% to 4.3%.

Sangamon County is more Multiracial than neighboring Menard County (2.8% Multiracial), Christian County (2.4% Multiracial), Morgan County (4% Multiracial), and Mason County (3.1% Multiracial). Sangamon County is less Multiracial than neighboring Logan County (4.6% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.