Winneshiek County Demographics

A map of Winneshiek County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	18,533	18,705	93.3%	93.2%
Hispanic	612	585	3.1%	2.9%
Multiracial	442	419	2.2%	2.1%
Asian	107	178	0.5%	0.9%
Native American/Other	98	64	0.5%	0.3%
Black	81	119	0.4%	0.6%

Winneshiek County, Iowa has an estimated population of 19,873, a less than 1% change from the 20,070 recorded in the 2020 Census. The population is 93.3% White, 3.1% Hispanic, 2.2% Multiracial, 0.5% Asian, 0.5% Native American/Other, and 0.4% Black. This demographic dot map shows the population of Winneshiek County, with one dot drawn for each person counted by the Census, color-coded by race.

Winneshiek 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 Winneshiek County, that probability was 13.0% in 2020 and 12.9% in the most recent ACS estimates.

Winneshiek County is ranked the 34th most populous county in Iowa, out of 99 counties. Winneshiek County was ranked the 34th most populous county in the 2020 Census.

Winneshiek County's White Population

18,533 residents of Winneshiek County, or 93.3% of the population, identify as White. The share of White residents in Winneshiek County is considerably higher than in Iowa overall, where 82.3% of the population is White. Winneshiek County ranks 36th statewide in terms of White residents as a share of the population, out of 99 counties.

Since the 2020 Census, Winneshiek County's White population has remained roughly the same. White residents' share of Winneshiek County's population has remained roughly unchanged at 93.3%.

Winneshiek County is more White than neighboring Fayette County (91% White), Allamakee County (86.5% White), and Howard County (93% White). Winneshiek County is less White than neighboring Fillmore County (94.3% White), and Houston County (93.5% White).

Winneshiek County's Black Population

81 residents of Winneshiek County, or 0.4% of the population, identify as Black. The share of Black residents in Winneshiek County is slightly lower than in Iowa overall, where 3.8% of the population is Black. Winneshiek County ranks 59th statewide in terms of Black residents as a share of the population, out of 99 counties.

Since the 2020 Census, Winneshiek County's Black population has declined by an estimated 31.9%. Black residents' share of Winneshiek County's population has remained roughly unchanged at 0.4%.

Winneshiek County is more Black than neighboring Houston County (0.3% Black). Winneshiek County is less Black than neighboring Fayette County (0.8% Black), Fillmore County (0.5% Black), Allamakee County (1.8% Black), and Howard County (0.8% Black).

Winneshiek County's Asian Population

107 residents of Winneshiek County, or 0.5% of the population, identify as Asian. The share of Asian residents in Winneshiek County is comparable to the share in Iowa overall, where 2.5% of the population is Asian. Winneshiek County ranks 25th statewide in terms of Asian residents as a share of the population, out of 99 counties.

Since the 2020 Census, Winneshiek County's Asian population has declined by an estimated 39.9%. Asian residents' share of Winneshiek County's population has remained roughly unchanged at 0.5%.

Winneshiek County is more Asian than neighboring Allamakee County (0.4% Asian), and Howard County (0.3% Asian). Winneshiek County is less Asian than neighboring Fayette County (0.9% Asian), Fillmore County (0.7% Asian), and Houston County (0.9% Asian).

Winneshiek County's Hispanic Population

612 residents of Winneshiek County, or 3.1% of the population, identify as Hispanic. The share of Hispanic residents in Winneshiek County is slightly lower than in Iowa overall, where 7.3% of the population is Hispanic. Winneshiek County ranks 59th statewide in terms of Hispanic residents as a share of the population, out of 99 counties.

Since the 2020 Census, Winneshiek County's Hispanic population has grown by an estimated 4.6%. Hispanic residents' share of Winneshiek County's population has remained roughly unchanged at 3.1%.

Winneshiek County is more Hispanic than neighboring Fillmore County (2% Hispanic), and Houston County (1.5% Hispanic). Winneshiek County is less Hispanic than neighboring Allamakee County (9.1% Hispanic), and Howard County (3.3% Hispanic).

Winneshiek County's Native American/Other Population

98 residents of Winneshiek 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 Winneshiek County is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Winneshiek County ranks 74th statewide in terms of Native American/Other residents as a share of the population, out of 99 counties.

Since the 2020 Census, Winneshiek County's Native American/Other population has grown by an estimated 53.1%. Native American/Other residents' share of Winneshiek County's population has remained roughly unchanged at 0.5%.

Winneshiek County is more Native American/Other than neighboring Allamakee County (0.1% Native American/Other), and Houston County (0.3% Native American/Other).

Winneshiek County's Multiracial Population

442 residents of Winneshiek County, or 2.2% of the population, identify as Multiracial. The share of Multiracial residents in Winneshiek County is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Winneshiek County ranks 79th statewide in terms of Multiracial residents as a share of the population, out of 99 counties.

Since the 2020 Census, Winneshiek County's Multiracial population has grown by an estimated 5.5%. Multiracial residents' share of Winneshiek County's population has remained roughly unchanged at 2.2%.

Winneshiek County is more Multiracial than neighboring Fillmore County (2% Multiracial), Allamakee County (2% Multiracial), and Howard County (2.1% Multiracial). Winneshiek County is less Multiracial than neighboring Fayette County (3.7% Multiracial), and Houston County (3.6% 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.