• county
  • FIPS 19113
  • Largest town: Cedar Rapids

Linn County, Iowa

Linn County had 231,762 residents in the Census Vintage 2024 estimate, on 717.0 square miles of land. It ranks 2nd of 99 in Iowa by population and 10th by land area.

Population
231,762
#2 of 99 in Iowa · #312 in US
Area
717.0 sq mi
#10 of 99 in Iowa · #1,260 in US
Density
323 / sq mi
#3 of 99 in Iowa · #410 in US
Median household income
$73,079
#31 of 99 in Iowa · #786 in US

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

Linn County within Iowa. Pin: Des Moines.

Measure from here

Tools and pages that start from Linn County

Linn County population, land area and income

Linn County had 231,762 residents in the Census Vintage 2024 estimate, on 717.0 square miles of land. It ranks 2nd of 99 in Iowa by population and 10th by land area. That works out to 323.2 people per square mile, 3.4 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in Iowa has 15,008 residents, so Linn County is 15.4 times that size.

Its SAIPE 2023 median household income of $73,079 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

231,762

3144th1st

312th of 3,144 (US)

Land area

717 sq mi

3144th1st

1260th of 3,144 (US)

Density

323.2 / sq mi

3144th1st

410th of 3,144 (US)

Median household income

$73,079

3143rd1st

786th of 3,143 (US)

Rank within Iowa (99)

Population

231,762

99th1st

2nd of 99 (IA)

Land area

717 sq mi

99th1st

10th of 99 (IA)

Density

323.2 / sq mi

99th1st

3rd of 99 (IA)

Median household income

$73,079

99th1st

31st of 99 (IA)

How Linn County's population changed since 2020

Linn County gained 1,329 residents between the July 2020 and July 2024 estimates, a rise of 0.6%. That ranks 30th 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, Linn County recorded 11,049 births and 9,384 deaths, a natural change of +1,665. Net international migration added +4,170 and net domestic migration, people moving to or from other US counties, came to -4,490. The largest single component was domestic migration, which removed 4,490 people.

230.4k2020229.5k2021228.9k2022229.4k2023231.8k2024
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
11,049
Deaths
9,384
Net international migration
+4,170
Net domestic migration
-4,490
Change, July 2023 to July 2024
+2,360

Where Linn County is

The Census internal point of Linn County is at 42.078000, -91.597700. 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 Linn 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: Linn County internal point. Dark pin: Des Moines.

Internal point

Decimal
42.078000, -91.597700
DMS
42°04'40.80"N 91°35'51.72"W
UTM
15N 615994.4E 4659387.9N
Geohash
9zqz7shd4
Plus code
86JC3CH2+6W

Towns in Linn County

13 incorporated places of 1,000+ people have residents in Linn County, 210,166 people together, or 91% of the county. Each figure counts only the part of the town inside Linn County; towns marked "part" extend into another county. The largest is Cedar Rapids with 137,904.

  1. 01Cedar Rapids137,904
  2. 02Marion42,542
  3. 03Hiawatha7,347
  4. 04Mount Vernon4,518
  5. 05Robins3,362
  6. 06Fairfax2,937
  7. 07Center Point2,578
  8. 08Ely2,371
  9. 09Lisbon2,238
  10. 10Palo1,554
  11. 11Central City1,254
  12. 12Springville1,161
  13. 13Walford (part)400
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Linn County

The Census 2024 county adjacency file lists 7 neighbors for Linn County. 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 108.6 miles WSW of Linn County's internal point in a straight line. The nearest place of 100,000 or more is Cedar Rapids, IA (population 137,904), 8.9 miles away. The nearest place of 10,000 or more is Marion, IA (population 42,542), 2.4 miles away.

Linn County FIPS code

The FIPS code of Linn County is 19113: state code 19 for Iowa plus county code 113. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $73,079.

Questions people ask

What is the population of Linn County, Iowa?

The Census Vintage 2024 estimate for July 1, 2024 is 231,762. That is up 1,329 people (0.6%) from the July 2020 estimate of 230,433.

What is the FIPS code of Linn County?

19113. The first two digits (19) are Iowa; the last three (113) identify the county.

What is the largest town in Linn County?

Cedar Rapids, with 137,904 residents inside Linn County in 2024.

Which counties border Linn County?

7 county-equivalents border it in the Census 2024 adjacency file: Johnson County, IA; Benton County, IA; Jones County, IA; Buchanan County, IA; Cedar County, IA; Delaware County, IA; Iowa County, IA.

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.