Lyon County Demographics

A map of Lyon County's Population by Race

Lyon County, Iowa has an estimated population of 12,162, a slight increase from the 11,934 recorded in the 2020 Census. The population is 93.4% White, 3.9% Hispanic, 1.8% Multiracial, 0.5% Asian, 0.4% Black, and 0.1% Native American/Other. This demographic dot map shows the population of Lyon County, with one dot drawn for each person counted by the Census, color-coded by race.

Lyon 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 Lyon County, that probability was 12.2% in 2020 and 12.6% in the most recent ACS estimates.

Lyon County is ranked the 62nd most populous county in Iowa, out of 99 counties. Lyon County was ranked the 64th most populous county in the 2020 Census.

Lyon County's White Population

11,356 residents of Lyon County, or 93.4% of the population, identify as White. The share of White residents in Lyon County is considerably higher than in Iowa overall, where 82.3% of the population is White. Lyon County ranks 28th statewide in terms of White residents as a share of the population, out of 99 counties.

Since the 2020 Census, Lyon County's White population has grown by an estimated 1.6%. White residents' share of Lyon County's population has remained roughly unchanged at 93.4%.

Lyon County is more White than neighboring Rock County (91.4% White), Sioux County (82.8% White), Lincoln County (89% White), Nobles County (52.2% White), and Osceola County (84% White).

Lyon County's Black Population

43 residents of Lyon County, or 0.4% of the population, identify as Black. The share of Black residents in Lyon County is slightly lower than in Iowa overall, where 3.8% of the population is Black. Lyon County ranks 83rd statewide in terms of Black residents as a share of the population, out of 99 counties.

Since the 2020 Census, Lyon County's Black population has grown by an estimated 13.2%. Black residents' share of Lyon County's population has remained roughly unchanged at 0.4%.

Lyon County is more Black than neighboring Rock County (0.1% Black). Lyon County is less Black than neighboring Sioux County (0.6% Black), Lincoln County (2.3% Black), Nobles County (4.6% Black), and Osceola County (0.5% Black).

Lyon County's Asian Population

59 residents of Lyon County, or 0.5% of the population, identify as Asian. The share of Asian residents in Lyon County is comparable to the share in Iowa overall, where 2.5% of the population is Asian. Lyon County ranks 92nd statewide in terms of Asian residents as a share of the population, out of 99 counties.

Since the 2020 Census, Lyon County's Asian population has grown by an estimated 145.8%. Asian residents' share of Lyon County's population has remained roughly unchanged at 0.5%.

Lyon County is more Asian than neighboring Rock County (0.4% Asian). Lyon County is less Asian than neighboring Lincoln County (1.7% Asian), Nobles County (4.2% Asian), and Osceola County (0.6% Asian).

Lyon County's Hispanic Population

470 residents of Lyon County, or 3.9% of the population, identify as Hispanic. The share of Hispanic residents in Lyon County is slightly lower than in Iowa overall, where 7.3% of the population is Hispanic. Lyon County ranks 47th statewide in terms of Hispanic residents as a share of the population, out of 99 counties.

Since the 2020 Census, Lyon County's Hispanic population has grown by an estimated 15.5%. Hispanic residents' share of Lyon County's population has increased from 3.4% to 3.9%.

Lyon County is more Hispanic than neighboring Lincoln County (3.2% Hispanic). Lyon County is less Hispanic than neighboring Rock County (4% Hispanic), Sioux County (14.3% Hispanic), Nobles County (34.5% Hispanic), and Osceola County (10.6% Hispanic).

Lyon County's Native American/Other Population

18 residents of Lyon 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 Lyon County is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Lyon County ranks 31st statewide in terms of Native American/Other residents as a share of the population, out of 99 counties.

Since the 2020 Census, Lyon County's Native American/Other population has declined by an estimated 73.5%. Native American/Other residents' share of Lyon County's population has decreased from 0.6% to 0.1%.

Lyon County is less Native American/Other than neighboring Rock County (0.6% Native American/Other), Sioux County (0.4% Native American/Other), Lincoln County (0.8% Native American/Other), Nobles County (0.6% Native American/Other), and Osceola County (1.3% Native American/Other).

Lyon County's Multiracial Population

216 residents of Lyon County, or 1.8% of the population, identify as Multiracial. The share of Multiracial residents in Lyon County is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Lyon County ranks 89th statewide in terms of Multiracial residents as a share of the population, out of 99 counties.

Since the 2020 Census, Lyon County's Multiracial population has declined by an estimated 2.7%. Multiracial residents' share of Lyon County's population has remained roughly unchanged at 1.8%.

Lyon County is more Multiracial than neighboring Sioux County (1.3% Multiracial). Lyon County is less Multiracial than neighboring Rock County (3.5% Multiracial), Lincoln County (3% Multiracial), Nobles County (3.8% Multiracial), and Osceola County (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.