• county
  • FIPS 19115
  • Largest town: Wapello

Louisa County, Iowa

Louisa County had 10,630 residents in the Census Vintage 2024 estimate, on 401.8 square miles of land. It ranks 69th of 99 in Iowa by population and 94th by land area.

Population
10,630
#69 of 99 in Iowa · #2,371 in US
Area
401.8 sq mi
#94 of 99 in Iowa · #2,516 in US
Density
26 / sq mi
#49 of 99 in Iowa · #2,026 in US
Median household income
$76,120
#18 of 99 in Iowa · #622 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Louisa County within Iowa. Pin: Des Moines.

Measure from here

Tools and pages that start from Louisa County

Louisa County population, land area and income

Louisa County had 10,630 residents in the Census Vintage 2024 estimate, on 401.8 square miles of land. It ranks 69th of 99 in Iowa by population and 94th by land area. That works out to 26.5 people per square mile, below the US average of 96.3, and below the national county median.

The median county-equivalent in Iowa has 15,008 residents; Louisa County is somewhat smaller.

Its SAIPE 2023 median household income of $76,120 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

10,630

3144th1st

2371st of 3,144 (US)

Land area

402 sq mi

3144th1st

2516th of 3,144 (US)

Density

26.5 / sq mi

3144th1st

2026th of 3,144 (US)

Median household income

$76,120

3143rd1st

622nd of 3,143 (US)

Rank within Iowa (99)

Population

10,630

99th1st

69th of 99 (IA)

Land area

402 sq mi

99th1st

94th of 99 (IA)

Density

26.5 / sq mi

99th1st

49th of 99 (IA)

Median household income

$76,120

99th1st

18th of 99 (IA)

How Louisa County's population changed since 2020

Louisa County lost 195 residents between the July 2020 and July 2024 estimates, a drop of 1.8%. That ranks 79th of 99 in Iowa for growth. The median Iowa county changed by -0.6%, and the state as a whole by +1.6%.

Since the April 2020 estimates base, Louisa County recorded 472 births and 509 deaths, a natural change of -37. Net international migration added +188 and net domestic migration, people moving to or from other US counties, came to -367. The largest single component was domestic migration, which removed 367 people.

10.8k202010.7k202110.7k202210.5k202310.6k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
472
Deaths
509
Net international migration
+188
Net domestic migration
-367
Change, July 2023 to July 2024
+90

Where Louisa County is

The Census internal point of Louisa County is at 41.218200, -91.257000. It sits in UTM zone 15N. The map shades Iowa's 99 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Louisa County outlined. Dots are towns of 1,000+ people with residents in it.

Monroe County: -2.9%Worth County: -1.7%Buena Vista County: +0.0%Jasper County: +0.8%Van Buren County: -0.0%Hardin County: -2.2%Ida County: -3.1%Marshall County: +0.8%Fayette County: -1.5%Ringgold County: -0.8%Wapello County: +1.0%Webster County: -0.2%Adams County: -2.8%Buchanan County: +0.6%Cerro Gordo County: -1.2%Lucas County: +1.6%Emmet County: -1.9%Floyd County: -3.8%Crawford County: -0.7%Linn County: +0.6%Montgomery County: -2.6%Polk County: +4.7%Cherokee County: +0.0%Bremer County: +1.3%Grundy County: +0.5%Adair County: -0.8%Cedar County: -1.4%Story County: +3.9%Mahaska County: -0.6%Davis County: +0.9%Clay County: +0.8%Johnson County: +4.6%Greene County: -1.0%Palo Alto County: -2.0%Benton County: +1.0%Cass County: -0.7%Wright County: -1.5%Audubon County: -2.1%Henry County: -5.3%Boone County: +0.1%Appanoose County: -1.4%Washington County: +0.4%Chickasaw County: -2.2%Poweshiek County: -0.9%Osceola County: -2.6%Wayne County: +1.8%Mitchell County: +0.4%Jefferson County: +0.5%Union County: -1.4%Butler County: -1.2%Hancock County: -1.3%Marion County: +1.9%Delaware County: +0.9%Humboldt County: +0.2%Sioux County: +1.8%Des Moines County: -1.1%O'Brien County: +0.8%Clayton County: -0.6%Black Hawk County: +1.0%Winnebago County: -2.6%Harrison County: +0.4%Decatur County: -1.0%Pocahontas County: -0.9%Lyon County: +3.8%Iowa County: -1.4%Franklin County: +0.3%Dickinson County: +2.2%Madison County: +3.2%Allamakee County: +0.8%Jones County: +2.2%Carroll County: -1.6%Kossuth County: -2.6%Hamilton County: -1.0%Howard County: -1.4%Page County: -1.1%Guthrie County: +1.5%Tama County: -1.8%Monona County: -3.6%Clarke County: -2.1%Lee County: -3.4%Mills County: +2.1%Sac County: -2.7%Scott County: +0.6%Keokuk County: -1.6%Jackson County: -0.3%Warren County: +7.1%Calhoun County: -1.9%Shelby County: +0.8%Fremont County: -1.1%Dubuque County: -0.1%Louisa County: -1.8%Taylor County: -0.6%Woodbury County: +1.2%Clinton County: -0.9%Winneshiek County: -1.6%Pottawattamie County: -0.1%Plymouth County: +0.5%Muscatine County: -2.4%Dallas County: +14.7%
Change 2020 to 2024
  1. < -1.9%
  2. < -1.0%
  3. < +0.0%
  4. < +0.9%
  5. ≥ +0.9%
no data

Orange pin: Louisa County internal point. Dark pin: Des Moines.

Internal point

Decimal
41.218200, -91.257000
DMS
41°13'5.52"N 91°15'25.20"W
UTM
15N 646107.5E 4564444.4N
Geohash
9zr47rs9m
Plus code
86HC6P9V+76

Towns in Louisa County

2 incorporated places of 1,000+ people have residents in Louisa County, 3,820 people together, or 36% of the county. Each figure counts only the part of the town inside Louisa County; towns marked "part" extend into another county. The largest is Wapello with 2,026.

  1. 01Wapello2,026
  2. 02Columbus Junction1,794
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Louisa County

The Census 2024 county adjacency file lists 7 neighbors for Louisa County, including 2 across a state line. The most populous is Johnson County, IA, with 160,080 residents. Distances run between Census internal points in a straight line.

Distance to Des Moines and the nearest big city

Des Moines is 124.3 miles WNW of Louisa County's internal point in a straight line. The nearest place of 100,000 or more is Davenport, IA (population 100,938), 41.1 miles away. The nearest place of 10,000 or more is Muscatine, IA (population 23,298), 17.0 miles away.

Louisa County FIPS code

The FIPS code of Louisa County is 19115: state code 19 for Iowa plus county code 115. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $76,120.

Questions people ask

What is the population of Louisa County, Iowa?

The Census Vintage 2024 estimate for July 1, 2024 is 10,630. That is down 195 people (1.8%) from the July 2020 estimate of 10,825.

What is the FIPS code of Louisa County?

19115. The first two digits (19) are Iowa; the last three (115) identify the county.

What is the largest town in Louisa County?

Wapello, with 2,026 residents inside Louisa County in 2024.

Which counties border Louisa County?

7 county-equivalents border it in the Census 2024 adjacency file: Johnson County, IA; Rock Island County, IL; Muscatine County, IA; Des Moines County, IA; Washington County, IA; Henry County, IA; Mercer County, IL.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.