Carroll County Demographics

A map of Carroll County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	13,674	13,743	87.8%	87.5%
Hispanic	820	757	5.3%	4.8%
Black	612	676	3.9%	4.3%
Multiracial	266	400	1.7%	2.5%
Asian	125	40	0.8%	0.3%
Native American/Other	79	86	0.5%	0.5%

Carroll County, Illinois has an estimated population of 15,576, a less than 1% change from the 15,702 recorded in the 2020 Census. The population is 87.8% White, 5.3% Hispanic, 3.9% Black, 1.7% Multiracial, 0.8% Asian, and 0.5% Native American/Other. This demographic dot map shows the population of Carroll County, with one dot drawn for each person counted by the Census, color-coded by race.

Carroll is about as racially diverse as it was in 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 Carroll County, that probability was 22.9% in 2020 and 22.5% in the most recent ACS estimates.

Carroll County is ranked the 68th most populous county in Illinois, out of 102 counties. Carroll County was ranked the 68th most populous county in the 2020 Census.

Carroll County's White Population

13,674 residents of Carroll County, or 87.8% of the population, identify as White. The share of White residents in Carroll County is significantly higher than in Illinois overall, where 58.1% of the population is White. Carroll County ranks 54th statewide in terms of White residents as a share of the population, out of 102 counties.

Since the 2020 Census, Carroll County's White population has remained roughly the same. White residents' share of Carroll County's population has remained roughly unchanged at 87.8%.

Carroll County is more White than neighboring Whiteside County (80.9% White), Stephenson County (78.9% White), and Ogle County (83% White). Carroll County is less White than neighboring Jo Daviess County (91.9% White), and Clinton County (89% White).

Carroll County's Black Population

612 residents of Carroll County, or 3.9% of the population, identify as Black. The share of Black residents in Carroll County is lower than in Illinois overall, where 13.3% of the population is Black. Carroll County ranks 38th statewide in terms of Black residents as a share of the population, out of 102 counties.

Since the 2020 Census, Carroll County's Black population has declined by an estimated 9.5%. Black residents' share of Carroll County's population has remained roughly unchanged at 3.9%.

Carroll County is more Black than neighboring Whiteside County (1.2% Black), Jo Daviess County (0.8% Black), Ogle County (1.2% Black), and Clinton County (3.1% Black). Carroll County is less Black than neighboring Stephenson County (8.5% Black).

Carroll County's Asian Population

125 residents of Carroll County, or 0.8% of the population, identify as Asian. The share of Asian residents in Carroll County is lower than in Illinois overall, where 5.9% of the population is Asian. Carroll County ranks 88th statewide in terms of Asian residents as a share of the population, out of 102 counties.

Since the 2020 Census, Carroll County's Asian population has grown by an estimated 212.5%. Asian residents' share of Carroll County's population has increased from 0.3% to 0.8%.

Carroll County is more Asian than neighboring Whiteside County (0.5% Asian), Jo Daviess County (0.5% Asian), Ogle County (0.6% Asian), and Clinton County (0.7% Asian).

Carroll County's Hispanic Population

820 residents of Carroll County, or 5.3% of the population, identify as Hispanic. The share of Hispanic residents in Carroll County is considerably lower than in Illinois overall, where 18.8% of the population is Hispanic. Carroll County ranks 35th statewide in terms of Hispanic residents as a share of the population, out of 102 counties.

Since the 2020 Census, Carroll County's Hispanic population has grown by an estimated 8.3%. Hispanic residents' share of Carroll County's population has increased from 4.8% to 5.3%.

Carroll County is more Hispanic than neighboring Jo Daviess County (4.2% Hispanic), and Clinton County (3.6% Hispanic). Carroll County is less Hispanic than neighboring Whiteside County (13.3% Hispanic), Stephenson County (5.6% Hispanic), and Ogle County (11.9% Hispanic).

Carroll County's Native American/Other Population

79 residents of Carroll County, or 0.5% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Carroll County is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Carroll County ranks 21st statewide in terms of Native American/Other residents as a share of the population, out of 102 counties.

Since the 2020 Census, Carroll County's Native American/Other population has declined by an estimated 8.1%. Native American/Other residents' share of Carroll County's population has remained roughly unchanged at 0.5%.

Carroll County is more Native American/Other than neighboring Ogle County (0.4% Native American/Other), and Clinton County (0.2% Native American/Other). Carroll County is less Native American/Other than neighboring Stephenson County (0.6% Native American/Other).

Carroll County's Multiracial Population

266 residents of Carroll County, or 1.7% of the population, identify as Multiracial. The share of Multiracial residents in Carroll County is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Carroll County ranks 92nd statewide in terms of Multiracial residents as a share of the population, out of 102 counties.

Since the 2020 Census, Carroll County's Multiracial population has declined by an estimated 33.5%. Multiracial residents' share of Carroll County's population has decreased from 2.5% to 1.7%.

Carroll County is less Multiracial than neighboring Whiteside County (3.6% Multiracial), Stephenson County (5.6% Multiracial), Jo Daviess County (2.2% Multiracial), Ogle County (2.9% Multiracial), and Clinton County (3.4% 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.