Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/IA/COUNTY/JASPER

Jasper County, IA ZIP codes

There are 12 ZIP codes in Jasper County, IA, in 12 towns, from 50028 to 50251. The largest are 50208 (Newton), 50054 (Colfax) and 50170 (Monroe). 1 more crosses into it from a neighbouring county: 50112.

The county seat is Newton.

ZIP codes
12
Partly in it
1 more
Towns
12
County seat
Newton
County FIPS
19099
State
Iowa
Population
37,954
Median household income
$71,311
Land area
730 sq mi
Area code
641

Jasper County ZIP codes by town

Newton (county seat)
50208

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

ZIP codes partly in Jasper County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Jasper County.

Map of Jasper County ZIP codes

500285005450127501355013750153501685017050208502285023250251

The ZIP codes of Jasper County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Jasper County in numbers

About 37,954 people live in Jasper County, in 15,010 households, the 17th most populous of Iowa's 99 counties. The median household income is $71,311 a year, 5% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $186,300 (10% below the Iowa median), and median gross rent is $836 a month. The median age is 41.3; 20.0% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 23 minutes.

Population37,954Jasper37,954
Households15,010Jasper15,010
Median age41.3Jasper41.3Iowa38.6US 38.9
Median household income$71,311Jasper$71,311Iowa$75,059US $80,734
Median home value$186,300Jasper$186,300Iowa$208,000US $332,700
Median gross rent$836Jasper$836Iowa$972US $1,413
Bachelor's degree or higher20.0%Jasper20.0%Iowa31.4%US 35.7%
Mean commute23.3 minJasper23.3 minIowa19.8 minUS 26.4 min
Population density52 / sq miJasper52 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Jasper County

Largest towns in Jasper County
TownZIP codesPopulation
Newton 1 15,700
Colfax 1 2,210
Monroe 1 2,120
Prairie City 1 1,711
Baxter 1 1,247
Sully 1 1,022
Kellogg 1 676
Lynnville 1 527
Mingo 1 328
Reasnor 1 152
Killduff 1 114
Ira 1 10

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Jasper County.

Not sure you are in Jasper County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Jasper County, with figures

ZIP codes in Jasper County
ZIP City Type Population Median income Median home
50028 Baxter , IA Standard 1,981 $72,022 $206,300
50054 Colfax , IA Standard 3,166 $89,940 $211,500
50127 Ira , IA Standard 10 — —
50135 Kellogg , IA Standard 1,754 $65,250 $165,200
50137 Killduff , IA Standard 114 — $187,500
50153 Lynnville , IA Standard 890 $73,798 $181,300
50168 Mingo , IA Standard 826 $113,750 $300,000
50170 Monroe , IA Standard 3,024 $88,704 $217,000
50208 Newton , IA Standard 20,595 $62,306 $168,900
50228 Prairie City , IA Standard 2,120 $90,833 $211,400
50232 Reasnor , IA Standard 569 $87,667 $264,200
50251 Sully , IA Standard 1,365 $91,061 $186,200

Cite this page

zipcodes.pro. “Jasper County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ia/county/jasper

Underlying data is public domain or openly licensed — sources, vintages and licences.