• county
  • FIPS 19157
  • Largest town: Grinnell

Poweshiek County, Iowa

Poweshiek County had 18,454 residents in the Census Vintage 2024 estimate, on 584.9 square miles of land. It ranks 37th of 99 in Iowa by population and 27th by land area.

Population
18,454
#37 of 99 in Iowa · #1,909 in US
Area
584.9 sq mi
#27 of 99 in Iowa · #1,681 in US
Density
32 / sq mi
#36 of 99 in Iowa · #1,877 in US
Median household income
$73,434
#30 of 99 in Iowa · #759 in US

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

Poweshiek County within Iowa. Pin: Des Moines.

Measure from here

Tools and pages that start from Poweshiek County

Poweshiek County population, land area and income

Poweshiek County had 18,454 residents in the Census Vintage 2024 estimate, on 584.9 square miles of land. It ranks 37th of 99 in Iowa by population and 27th by land area. That works out to 31.5 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; Poweshiek County is somewhat larger.

Its SAIPE 2023 median household income of $73,434 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

18,454

3144th1st

1909th of 3,144 (US)

Land area

585 sq mi

3144th1st

1681st of 3,144 (US)

Density

31.5 / sq mi

3144th1st

1877th of 3,144 (US)

Median household income

$73,434

3143rd1st

759th of 3,143 (US)

Rank within Iowa (99)

Population

18,454

99th1st

37th of 99 (IA)

Land area

585 sq mi

99th1st

27th of 99 (IA)

Density

31.5 / sq mi

99th1st

36th of 99 (IA)

Median household income

$73,434

99th1st

30th of 99 (IA)

How Poweshiek County's population changed since 2020

Poweshiek County lost 174 residents between the July 2020 and July 2024 estimates, a drop of 0.9%. That ranks 57th 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, Poweshiek County recorded 759 births and 987 deaths, a natural change of -228. Net international migration added +190 and net domestic migration, people moving to or from other US counties, came to -170. The largest single component was natural change, which removed 228 people.

18.6k202018.6k202118.5k202218.5k202318.5k2024
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
759
Deaths
987
Net international migration
+190
Net domestic migration
-170
Change, July 2023 to July 2024
-43

Where Poweshiek County is

The Census internal point of Poweshiek County is at 41.684600, -92.522900. 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 Poweshiek 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: Poweshiek County internal point. Dark pin: Des Moines.

Internal point

Decimal
41.684600, -92.522900
DMS
41°41'4.56"N 92°31'22.44"W
UTM
15N 539706.9E 4614868.6N
Geohash
9zqjns6yk
Plus code
86H9MFMG+RR

Towns in Poweshiek County

3 incorporated places of 1,000+ people have residents in Poweshiek County, 12,390 people together, or 67% of the county. Each figure counts only the part of the town inside Poweshiek County; towns marked "part" extend into another county. The largest is Grinnell with 9,495.

  1. 01Grinnell9,495
  2. 02Brooklyn1,474
  3. 03Montezuma1,421
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Poweshiek County

The Census 2024 county adjacency file lists 7 neighbors for Poweshiek County. The most populous is Marshall County, IA, with 40,392 residents. Distances run between Census internal points in a straight line.

Distance to Des Moines and the nearest big city

Des Moines is 56.2 miles W of Poweshiek County's internal point in a straight line. The nearest place of 100,000 or more is Cedar Rapids, IA (population 137,904), 47.5 miles away. The nearest place of 10,000 or more is Newton, IA (population 15,709), 26.7 miles away.

Poweshiek County FIPS code

The FIPS code of Poweshiek County is 19157: state code 19 for Iowa plus county code 157. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $73,434.

Questions people ask

What is the population of Poweshiek County, Iowa?

The Census Vintage 2024 estimate for July 1, 2024 is 18,454. That is down 174 people (0.9%) from the July 2020 estimate of 18,628.

What is the FIPS code of Poweshiek County?

19157. The first two digits (19) are Iowa; the last three (157) identify the county.

What is the largest town in Poweshiek County?

Grinnell, with 9,495 residents inside Poweshiek County in 2024.

Which counties border Poweshiek County?

7 county-equivalents border it in the Census 2024 adjacency file: Marshall County, IA; Jasper County, IA; Benton County, IA; Mahaska County, IA; Tama County, IA; Iowa County, IA; Keokuk 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.