Clinton County Demographics

A map of Clinton County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	41,188	41,226	89.0%	88.7%
Hispanic	1,668	1,539	3.6%	3.3%
Multiracial	1,571	1,834	3.4%	3.9%
Black	1,434	1,392	3.1%	3.0%
Asian	310	252	0.7%	0.5%
Native American/Other	97	217	0.2%	0.5%

Clinton County, Iowa has an estimated population of 46,268, a less than 1% change from the 46,460 recorded in the 2020 Census. The population is 89.0% White, 3.6% Hispanic, 3.4% Multiracial, 3.1% Black, 0.7% Asian, and 0.2% Native American/Other. This demographic dot map shows the population of Clinton County, with one dot drawn for each person counted by the Census, color-coded by race.

Clinton is about as racially diverse as it was in the 2020 Census. It is considerably less diverse than Iowa overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Clinton County, that probability was 20.9% in 2020 and 20.4% in the most recent ACS estimates.

Clinton County is ranked the 12th most populous county in Iowa, out of 99 counties. Clinton County was ranked the 12th most populous county in the 2020 Census.

Clinton County's White Population

41,188 residents of Clinton County, or 89.0% of the population, identify as White. The share of White residents in Clinton County is higher than in Iowa overall, where 82.3% of the population is White. Clinton County ranks 67th statewide in terms of White residents as a share of the population, out of 99 counties.

Since the 2020 Census, Clinton County's White population has remained roughly the same. White residents' share of Clinton County's population has remained roughly unchanged at 89.0%.

Clinton County is more White than neighboring Scott County (77% White), and Rock Island County (67.4% White). Clinton County is less White than neighboring Jackson County (93.6% White), Jo Daviess County (91.9% White), and Cedar County (93.2% White).

Clinton County's Black Population

1,434 residents of Clinton County, or 3.1% of the population, identify as Black. The share of Black residents in Clinton County is comparable to the share in Iowa overall, where 3.8% of the population is Black. Clinton County ranks 12th statewide in terms of Black residents as a share of the population, out of 99 counties.

Since the 2020 Census, Clinton County's Black population has grown by an estimated 3.0%. Black residents' share of Clinton County's population has remained roughly unchanged at 3.1%.

Clinton County is more Black than neighboring Jackson County (1% Black), Jo Daviess County (0.8% Black), and Cedar County (0.4% Black). Clinton County is less Black than neighboring Scott County (7.1% Black), and Rock Island County (10.9% Black).

Clinton County's Asian Population

310 residents of Clinton County, or 0.7% of the population, identify as Asian. The share of Asian residents in Clinton County is comparable to the share in Iowa overall, where 2.5% of the population is Asian. Clinton County ranks 39th statewide in terms of Asian residents as a share of the population, out of 99 counties.

Since the 2020 Census, Clinton County's Asian population has grown by an estimated 23.0%. Asian residents' share of Clinton County's population has remained roughly unchanged at 0.7%.

Clinton County is more Asian than neighboring Jackson County (0.1% Asian), Jo Daviess County (0.5% Asian), and Cedar County (0.5% Asian). Clinton County is less Asian than neighboring Scott County (2.8% Asian), and Rock Island County (2.6% Asian).

Clinton County's Hispanic Population

1,668 residents of Clinton County, or 3.6% of the population, identify as Hispanic. The share of Hispanic residents in Clinton County is slightly lower than in Iowa overall, where 7.3% of the population is Hispanic. Clinton County ranks 48th statewide in terms of Hispanic residents as a share of the population, out of 99 counties.

Since the 2020 Census, Clinton County's Hispanic population has grown by an estimated 8.4%. Hispanic residents' share of Clinton County's population has remained roughly unchanged at 3.6%.

Clinton County is more Hispanic than neighboring Jackson County (1.6% Hispanic), and Cedar County (2.8% Hispanic). Clinton County is less Hispanic than neighboring Scott County (7.4% Hispanic), Rock Island County (14.2% Hispanic), and Jo Daviess County (4.2% Hispanic).

Clinton County's Native American/Other Population

97 residents of Clinton County, or 0.2% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Clinton County is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Clinton County ranks 49th statewide in terms of Native American/Other residents as a share of the population, out of 99 counties.

Since the 2020 Census, Clinton County's Native American/Other population has declined by an estimated 55.3%. Native American/Other residents' share of Clinton County's population has remained roughly unchanged at 0.2%.

Clinton County is less Native American/Other than neighboring Scott County (0.6% Native American/Other), Jackson County (1.1% Native American/Other), Rock Island County (0.5% Native American/Other), Jo Daviess County (0.5% Native American/Other), and Cedar County (0.4% Native American/Other).

Clinton County's Multiracial Population

1,571 residents of Clinton County, or 3.4% of the population, identify as Multiracial. The share of Multiracial residents in Clinton County is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Clinton County ranks 8th statewide in terms of Multiracial residents as a share of the population, out of 99 counties.

Since the 2020 Census, Clinton County's Multiracial population has declined by an estimated 14.3%. Multiracial residents' share of Clinton County's population has decreased from 3.9% to 3.4%.

Clinton County is more Multiracial than neighboring Jackson County (2.6% Multiracial), Jo Daviess County (2.2% Multiracial), and Cedar County (2.8% Multiracial). Clinton County is less Multiracial than neighboring Scott County (5.1% Multiracial), and Rock Island County (4.4% 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.