• county
  • FIPS 19079
  • Largest town: Webster City

Hamilton County, Iowa

Hamilton County had 14,856 residents in the Census Vintage 2024 estimate, on 576.7 square miles of land. It ranks 51st of 99 in Iowa by population and 36th by land area.

Population
14,856
#51 of 99 in Iowa · #2,099 in US
Area
576.7 sq mi
#36 of 99 in Iowa · #1,716 in US
Density
26 / sq mi
#52 of 99 in Iowa · #2,046 in US
Median household income
$71,731
#40 of 99 in Iowa · #874 in US

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

Hamilton County within Iowa. Pin: Des Moines.

Measure from here

Tools and pages that start from Hamilton County

Hamilton County population, land area and income

Hamilton County had 14,856 residents in the Census Vintage 2024 estimate, on 576.7 square miles of land. It ranks 51st of 99 in Iowa by population and 36th by land area. That works out to 25.8 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, about the same as Hamilton County.

Its SAIPE 2023 median household income of $71,731 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

14,856

3144th1st

2099th of 3,144 (US)

Land area

577 sq mi

3144th1st

1716th of 3,144 (US)

Density

25.8 / sq mi

3144th1st

2046th of 3,144 (US)

Median household income

$71,731

3143rd1st

874th of 3,143 (US)

Rank within Iowa (99)

Population

14,856

99th1st

51st of 99 (IA)

Land area

577 sq mi

99th1st

36th of 99 (IA)

Density

25.8 / sq mi

99th1st

52nd of 99 (IA)

Median household income

$71,731

99th1st

40th of 99 (IA)

How Hamilton County's population changed since 2020

Hamilton County lost 155 residents between the July 2020 and July 2024 estimates, a drop of 1.0%. That ranks 60th 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, Hamilton County recorded 767 births and 845 deaths, a natural change of -78. Net international migration added +223 and net domestic migration, people moving to or from other US counties, came to -325. The largest single component was domestic migration, which removed 325 people.

15.0k202014.9k202114.8k202214.8k202314.9k2024
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
767
Deaths
845
Net international migration
+223
Net domestic migration
-325
Change, July 2023 to July 2024
+8

Where Hamilton County is

The Census internal point of Hamilton County is at 42.390800, -93.709100. 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 Hamilton 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: Hamilton County internal point. Dark pin: Des Moines.

Internal point

Decimal
42.390800, -93.709100
DMS
42°23'26.88"N 93°42'32.76"W
UTM
15N 441634.6E 4693411.3N
Geohash
9zt35t507
Plus code
86J897RR+89

Towns in Hamilton County

2 incorporated places of 1,000+ people have residents in Hamilton County, 8,997 people together, or 61% of the county. Each figure counts only the part of the town inside Hamilton County; towns marked "part" extend into another county. The largest is Webster City with 7,763.

  1. 01Webster City7,763
  2. 02Jewell Junction1,234
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Hamilton County

The Census 2024 county adjacency file lists 6 neighbors for Hamilton County. The most populous is Story County, IA, with 102,498 residents. Distances run between Census internal points in a straight line.

Distance to Des Moines and the nearest big city

Des Moines is 55.5 miles S of Hamilton County's internal point in a straight line. The nearest place of 100,000 or more is Des Moines, IA (population 213,096), 56.7 miles away. The nearest place of 10,000 or more is Boone, IA (population 12,461), 25.0 miles away.

Hamilton County FIPS code

The FIPS code of Hamilton County is 19079: state code 19 for Iowa plus county code 079. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $71,731.

Questions people ask

What is the population of Hamilton County, Iowa?

The Census Vintage 2024 estimate for July 1, 2024 is 14,856. That is down 155 people (1.0%) from the July 2020 estimate of 15,011.

What is the FIPS code of Hamilton County?

19079. The first two digits (19) are Iowa; the last three (079) identify the county.

What is the largest town in Hamilton County?

Webster City, with 7,763 residents inside Hamilton County in 2024.

Which counties border Hamilton County?

6 county-equivalents border it in the Census 2024 adjacency file: Story County, IA; Webster County, IA; Boone County, IA; Hardin County, IA; Wright County, IA; Franklin 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.