Louisa County Demographics

A map of Louisa County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	8,220	8,485	77.0%	78.3%
Hispanic	1,754	1,728	16.4%	15.9%
Multiracial	366	261	3.4%	2.4%
Asian	231	265	2.2%	2.4%
Black	95	73	0.9%	0.7%
Native American/Other	12	25	0.1%	0.2%

Louisa County, Iowa has an estimated population of 10,678, a slight decrease from the 10,837 recorded in the 2020 Census. The population is 77.0% White, 16.4% Hispanic, 3.4% Multiracial, 2.2% Asian, 0.9% Black, and 0.1% Native American/Other. This demographic dot map shows the population of Louisa County, with one dot drawn for each person counted by the Census, color-coded by race.

Louisa has become more racially diverse since the 2020 Census. It is considerably more 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 Louisa County, that probability was 36.0% in 2020 and 37.9% in the most recent ACS estimates.

Louisa County is ranked the 68th most populous county in Iowa, out of 99 counties. Louisa County was ranked the 67th most populous county in the 2020 Census.

Louisa County's White Population

8,220 residents of Louisa County, or 77.0% of the population, identify as White. The share of White residents in Louisa County is lower than in Iowa overall, where 82.3% of the population is White. Louisa County ranks 87th statewide in terms of White residents as a share of the population, out of 99 counties.

Since the 2020 Census, Louisa County's White population has declined by an estimated 3.1%. White residents' share of Louisa County's population has decreased from 78.3% to 77.0%.

Louisa County is more White than neighboring Muscatine County (75% White). Louisa County is less White than neighboring Des Moines County (84.5% White), Henry County (86.2% White), Washington County (88.7% White), and Mercer County (93.1% White).

Louisa County's Black Population

95 residents of Louisa County, or 0.9% of the population, identify as Black. The share of Black residents in Louisa County is slightly lower than in Iowa overall, where 3.8% of the population is Black. Louisa County ranks 53rd statewide in terms of Black residents as a share of the population, out of 99 counties.

Since the 2020 Census, Louisa County's Black population has grown by an estimated 30.1%. Black residents' share of Louisa County's population has remained roughly unchanged at 0.9%.

Louisa County is more Black than neighboring Mercer County (0.6% Black). Louisa County is less Black than neighboring Muscatine County (2.2% Black), Des Moines County (4.7% Black), Henry County (2.5% Black), and Washington County (1% Black).

Louisa County's Asian Population

231 residents of Louisa County, or 2.2% of the population, identify as Asian. The share of Asian residents in Louisa County is comparable to the share in Iowa overall, where 2.5% of the population is Asian. Louisa County ranks 11th statewide in terms of Asian residents as a share of the population, out of 99 counties.

Since the 2020 Census, Louisa County's Asian population has declined by an estimated 12.8%. Asian residents' share of Louisa County's population has remained roughly unchanged at 2.2%.

Louisa County is more Asian than neighboring Muscatine County (0.6% Asian), Des Moines County (1.2% Asian), Henry County (0.9% Asian), Washington County (0.4% Asian), and Mercer County (0.4% Asian).

Louisa County's Hispanic Population

1,754 residents of Louisa County, or 16.4% of the population, identify as Hispanic. The share of Hispanic residents in Louisa County is higher than in Iowa overall, where 7.3% of the population is Hispanic. Louisa County ranks 8th statewide in terms of Hispanic residents as a share of the population, out of 99 counties.

Since the 2020 Census, Louisa County's Hispanic population has grown by an estimated 1.5%. Hispanic residents' share of Louisa County's population has remained roughly unchanged at 16.4%.

Louisa County is more Hispanic than neighboring Des Moines County (3.7% Hispanic), Henry County (5.5% Hispanic), Washington County (7.8% Hispanic), and Mercer County (3.4% Hispanic). Louisa County is less Hispanic than neighboring Muscatine County (18.8% Hispanic).

Louisa County's Native American/Other Population

12 residents of Louisa 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 Louisa County is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Louisa County ranks 87th statewide in terms of Native American/Other residents as a share of the population, out of 99 counties.

Since the 2020 Census, Louisa County's Native American/Other population has declined by an estimated 52.0%. Native American/Other residents' share of Louisa County's population has remained roughly unchanged at 0.1%.

Louisa County is less Native American/Other than neighboring Muscatine County (0.3% Native American/Other), Des Moines County (0.4% Native American/Other), Henry County (0.4% Native American/Other), and Washington County (0.2% Native American/Other).

Louisa County's Multiracial Population

366 residents of Louisa County, or 3.4% of the population, identify as Multiracial. The share of Multiracial residents in Louisa County is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Louisa County ranks 57th statewide in terms of Multiracial residents as a share of the population, out of 99 counties.

Since the 2020 Census, Louisa County's Multiracial population has grown by an estimated 40.2%. Multiracial residents' share of Louisa County's population has increased from 2.4% to 3.4%.

Louisa County is more Multiracial than neighboring Muscatine County (3.1% Multiracial), Washington County (2% Multiracial), and Mercer County (2.4% Multiracial). Louisa County is less Multiracial than neighboring Des Moines County (5.5% Multiracial), and Henry 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.