Clayton County Demographics
A map of Clayton County's Population by Race
Clayton County, Iowa has an estimated population of 17,013, a less than 1% change from the 17,043 recorded in the 2020 Census. The population is 95.0% White, 2.3% Hispanic, 1.7% Multiracial, 0.6% Black, 0.3% Asian, and 0.1% Native American/Other. This demographic dot map shows the population of Clayton County, with one dot drawn for each person counted by the Census, color-coded by race.
Clayton has become slightly less racially diverse since 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 Clayton County, that probability was 10.5% in 2020 and 9.8% in the most recent ACS estimates.
Clayton County is ranked the 41st most populous county in Iowa, out of 99 counties. Clayton County was ranked the 42nd most populous county in the 2020 Census.
Clayton County's White Population
16,154 residents of Clayton County, or 95.0% of the population, identify as White. The share of White residents in Clayton County is considerably higher than in Iowa overall, where 82.3% of the population is White. Clayton County ranks 14th statewide in terms of White residents as a share of the population, out of 99 counties.
Since the 2020 Census, Clayton County's White population has remained roughly the same. White residents' share of Clayton County's population has increased from 94.5% to 95.0%.
Clayton County is more White than neighboring Delaware County (94.1% White), Allamakee County (86.5% White), Fayette County (91% White), Crawford County (92.7% White), and Dubuque County (88.3% White).
Clayton County's Black Population
108 residents of Clayton County, or 0.6% of the population, identify as Black. The share of Black residents in Clayton County is slightly lower than in Iowa overall, where 3.8% of the population is Black. Clayton County ranks 42nd statewide in terms of Black residents as a share of the population, out of 99 counties.
Since the 2020 Census, Clayton County's Black population has declined by an estimated 31.6%. Black residents' share of Clayton County's population has remained roughly unchanged at 0.6%.
Clayton County is more Black than neighboring Delaware County (0.1% Black). Clayton County is less Black than neighboring Allamakee County (1.8% Black), Fayette County (0.8% Black), Crawford County (1.6% Black), and Dubuque County (2.9% Black).
Clayton County's Asian Population
56 residents of Clayton County, or 0.3% of the population, identify as Asian. The share of Asian residents in Clayton County is slightly lower than in Iowa overall, where 2.5% of the population is Asian. Clayton County ranks 79th statewide in terms of Asian residents as a share of the population, out of 99 counties.
Since the 2020 Census, Clayton County's Asian population has grown by an estimated 19.1%. Asian residents' share of Clayton County's population has remained roughly unchanged at 0.3%.
Clayton County is more Asian than neighboring Delaware County (0% Asian). Clayton County is less Asian than neighboring Allamakee County (0.4% Asian), Fayette County (0.9% Asian), Crawford County (0.5% Asian), and Dubuque County (1.3% Asian).
Clayton County's Hispanic Population
394 residents of Clayton County, or 2.3% of the population, identify as Hispanic. The share of Hispanic residents in Clayton County is slightly lower than in Iowa overall, where 7.3% of the population is Hispanic. Clayton County ranks 82nd statewide in terms of Hispanic residents as a share of the population, out of 99 counties.
Since the 2020 Census, Clayton County's Hispanic population has grown by an estimated 14.9%. Hispanic residents' share of Clayton County's population has remained roughly unchanged at 2.3%.
Clayton County is more Hispanic than neighboring Delaware County (1.7% Hispanic), and Crawford County (2% Hispanic). Clayton County is less Hispanic than neighboring Allamakee County (9.1% Hispanic), Fayette County (3.1% Hispanic), and Dubuque County (3.3% Hispanic).
Clayton County's Native American/Other Population
15 residents of Clayton County, or 0.1% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Clayton County is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Clayton County ranks 72nd statewide in terms of Native American/Other residents as a share of the population, out of 99 counties.
Since the 2020 Census, Clayton County's Native American/Other population has declined by an estimated 73.2%. Native American/Other residents' share of Clayton County's population has remained roughly unchanged at 0.1%.
Clayton County is less Native American/Other than neighboring Delaware County (0.5% Native American/Other), Fayette County (0.5% Native American/Other), Crawford County (0.5% Native American/Other), and Dubuque County (1% Native American/Other).
Clayton County's Multiracial Population
286 residents of Clayton County, or 1.7% of the population, identify as Multiracial. The share of Multiracial residents in Clayton County is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Clayton County ranks 88th statewide in terms of Multiracial residents as a share of the population, out of 99 counties.
Since the 2020 Census, Clayton County's Multiracial population has declined by an estimated 12.8%. Multiracial residents' share of Clayton County's population has remained roughly unchanged at 1.7%.
Clayton County is less Multiracial than neighboring Delaware County (3.7% Multiracial), Allamakee County (2% Multiracial), Fayette County (3.7% Multiracial), Crawford County (2.8% Multiracial), and Dubuque County (3.3% 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.