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Jasper County, IA
13 cities and towns and 13 ZIP codes in Jasper County, Iowa.
Population
37,954
Land area
730sq mi
People per sq mi
52
ZIP codes
13
Cities and towns in Jasper County
Jasper County at a glance
- By population, it ranks 17th among 99 counties in Iowa.
- The median household income is $71,311, 5% below the Iowa median of $75,059.
- A typical owner-occupied home is valued at $186,300 (10% below Iowa) and median rent is $836 a month.
- Its largest cities are Newton (15,700), Colfax (2,210) and Monroe (2,120).
Local data for Jasper County, IA
Counts from official public data
Housing and community stats
Jasper County, IA, American Community Survey 2020-2024
Median household income
$71,311
Poverty rate
8.3%
Median home value
$186,300
Prices +0.6% in a year
Median rent
$836/mo
Homeownership
72.3%
Bachelor's or higher
20.0%
Median age
41.3
Average commute
23.3 min
Largest reported origins and ancestries: German Americans (9,815), Irish Americans (4,519), Dutch Americans (4,187).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
3.2%
Sep 2026, +0.1 pts in a year
Average annual pay
$52,032
10,688 jobs, 2025
Income per person
$53,859
BEA, 2024
Federal spending
$240M
FY 2026, $6,337 per person
PPP loans
$60.1M
1,604 loans, 7,124 jobs reported
Campaign donations
$109K
Itemized, 2026 cycle
How people get to work
Jasper County, IA, workers 16 and older. American Community Survey 5-year estimates
- Drove alone78.0%
- Carpooled8.1%
- Public transit0.0%
- Walked1.9%
- Bicycle0.5%
- Taxi, ride-hailing, motorcycle or other0.8%
- Worked from home10.6%
Average one-way commute: 23.3 minutes for people who do not work from home.
Environment and hazard risk
Jasper County, IA, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: drought
Storm events since 1996
709
Most often hail
Flood insurance policies
24
0.1% of homes, county
July high / Jan low
85° / 10°F
35.1 inches of rain a year
Hazards, floods and storm historyCheck a flood zone12 historic places
Health statistics
Share of adults in Jasper County, IA, CDC PLACES estimates
Obesity
38.3%
U.S. 33.3% +5.0 pts
Diabetes
11.9%
U.S. 12.1% about the same
Smoking
16.5%
U.S. 12.8% +3.7 pts
Uninsured (18-64)
7.2%
U.S. 11.1% -3.9 pts
Cities, towns and ZIP codes in Jasper County
Population shown
Frequently asked questions
- What is the largest city in Jasper County, IA?
- Newton is the largest city or town in Jasper County, with about 15,700 residents.
- How many ZIP codes are in Jasper County?
- Jasper County includes 13 ZIP Code Tabulation Areas, including 50028, 50054, 50127, 50135, 50137.
- What is the population of Jasper County, IA?
- About 37,954 people live in Jasper County, based on American Community Survey 5-year estimates.
- What counties border Jasper County?
- Jasper County borders Polk County, Story County, Marshall County, Marion County, Mahaska County, Poweshiek County, Tama County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023