Calhoun County, Iowa

Calhoun County, Iowa, has 9,562 residents (July 2025 estimate). Its county seat is Rockwell City. It uses Central Time and covers 570 sq mi (1,476 km²) of land.

Calhoun County in Iowa

Calhoun County and its neighbors (simplified outlines). Open in OpenStreetMap ↗

Resident population, July 2025: 9,562
Land area: 570 sq mi (1,476 km²)
County seat or government: Rockwell City
Time zone: Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income: $64,964 ± $5,720
Median home value: $118,800 ± $6,946
Median rent, with utilities: $723 ± $26
Homes lived in by their owners: 80.5% ± 1.9 points
County type: County
Metro or micro area: Outside any metro or micro areaNext to: Carroll, IA micro area, Fort Dodge, IA micro area, and Storm Lake, IA micro area
Water area: 2.27 sq mi (5.87 km²)
State: Iowa
County code (FIPS): 19025
Coordinates (central point): 42.386061, -94.643602

Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Calhoun County

Time zone	Local time and UTC offset	Next clock change
Central TimeAmerica/Chicago	UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock.	Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

505793,034 people
505632,505 people
505832,288 people
514491,950 people
50540998 people
50050712 people
50575696 people
50538661 people
50561585 people
51433567 people
51453500 people
50566325 people

All 15

50586272 people
5055196 people
5055276 people

15 ZIP Code areas overlap Calhoun County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Calhoun County, largest first

Lincoln Township1,824 people
Twin Lakes Township1,526 people
Center Township1,079 people
Reading Township687 people
Butler Township612 people
Sherman Township602 people
Union Township431 people
Cedar Township288 people
Lake Creek Township251 people
Greenfield Township217 people
Garfield Township157 people
Jackson Township154 people

All 16

People counts are American Community Survey 2020–2024 5-year estimates. All townships in Iowa, by county

School districts in Calhoun County, largest first

Southeast Valley Community School District6,974 people
South Central Calhoun Community School District6,497 people
Pocahontas Area Community School District4,507 people
Manson Northwest Webster Community School District4,007 people
Newell-Fonda Community School District2,401 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

All 13

Yetter, Iowa (city)15 people

Bordering areas, nearest first

Distances are straight lines between map points.

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.