• county
  • FIPS 19029
  • Largest town: Atlantic

Cass County, Iowa

Cass County had 13,024 residents in the Census Vintage 2024 estimate, on 564.3 square miles of land. It ranks 58th of 99 in Iowa by population and 58th by land area.

Population
13,024
#58 of 99 in Iowa · #2,217 in US
Area
564.3 sq mi
#58 of 99 in Iowa · #1,820 in US
Density
23 / sq mi
#61 of 99 in Iowa · #2,129 in US
Median household income
$59,509
#93 of 99 in Iowa · #1,884 in US

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

Cass County within Iowa. Pin: Des Moines.

Measure from here

Tools and pages that start from Cass County

Cass County population, land area and income

Cass County had 13,024 residents in the Census Vintage 2024 estimate, on 564.3 square miles of land. It ranks 58th of 99 in Iowa by population and 58th by land area. That works out to 23.1 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; Cass County is somewhat smaller.

Its SAIPE 2023 median household income of $59,509 is below the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

13,024

3144th1st

2217th of 3,144 (US)

Land area

564 sq mi

3144th1st

1820th of 3,144 (US)

Density

23.1 / sq mi

3144th1st

2129th of 3,144 (US)

Median household income

$59,509

3143rd1st

1884th of 3,143 (US)

Rank within Iowa (99)

Population

13,024

99th1st

58th of 99 (IA)

Land area

564 sq mi

99th1st

58th of 99 (IA)

Density

23.1 / sq mi

99th1st

61st of 99 (IA)

Median household income

$59,509

99th1st

93rd of 99 (IA)

How Cass County's population changed since 2020

Cass County lost 91 residents between the July 2020 and July 2024 estimates, a drop of 0.7%. That ranks 52nd 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, Cass County recorded 555 births and 880 deaths, a natural change of -325. Net international migration added +13 and net domestic migration, people moving to or from other US counties, came to +207. The largest single component was natural change, which removed 325 people.

13.1k202013.1k202113.1k202213.1k202313.0k2024
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
555
Deaths
880
Net international migration
+13
Net domestic migration
+207
Change, July 2023 to July 2024
-107

Where Cass County is

The Census internal point of Cass County is at 41.333800, -94.933300. 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 Cass 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: Cass County internal point. Dark pin: Des Moines.

Internal point

Decimal
41.333800, -94.933300
DMS
41°20'1.68"N 94°55'59.88"W
UTM
15N 338225.6E 4577616.0N
Geohash
9zk7psxdv
Plus code
86H783M8+GM

Towns in Cass County

One incorporated place of 1,000+ people has residents in Cass County, 6,717 people together, or 52% of the county. Each figure counts only the part of the town inside Cass County; towns marked "part" extend into another county. The largest is Atlantic with 6,717.

  1. 01Atlantic6,717
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Cass County

The Census 2024 county adjacency file lists 7 neighbors for Cass County. The most populous is Pottawattamie County, IA, with 93,529 residents. Distances run between Census internal points in a straight line.

Distance to Des Moines and the nearest big city

Des Moines is 71.1 miles ENE of Cass County's internal point in a straight line. The nearest place of 100,000 or more is Omaha, NE (population 489,265), 58.3 miles away. The nearest place of 10,000 or more is Council Bluffs, IA (population 62,665), 48.2 miles away.

Cass County FIPS code

The FIPS code of Cass County is 19029: state code 19 for Iowa plus county code 029. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $59,509.

Questions people ask

What is the population of Cass County, Iowa?

The Census Vintage 2024 estimate for July 1, 2024 is 13,024. That is down 91 people (0.7%) from the July 2020 estimate of 13,115.

What is the FIPS code of Cass County?

19029. The first two digits (19) are Iowa; the last three (029) identify the county.

What is the largest town in Cass County?

Atlantic, with 6,717 residents inside Cass County in 2024.

Which counties border Cass County?

7 county-equivalents border it in the Census 2024 adjacency file: Pottawattamie County, IA; Shelby County, IA; Guthrie County, IA; Montgomery County, IA; Adair County, IA; Audubon County, IA; Adams 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.