Marshall County, IA: Cities, ZIP Codes & Population
Marshall County is a county-level area in Iowa identified by the FIPS code 19127. Our data lists 14 places in it, led by Marshalltown, IA, with combined estimates of about 32,284 people across those places. This page shows its cities, ZIP codes, time zone and neighboring counties.
What are the key facts about Marshall County?
| County | Marshall County |
|---|---|
| State | Iowa |
| FIPS code | 19127 |
| Places in our data | 14 |
| Places with a city page | 1 |
| Combined place estimates | 32,284 |
| Largest place | Marshalltown, IA (26,666) |
| Rank in state | 16th of 99 counties by combined place population |
| Weighted density | 1,314 per sq mi |
| Time zone | Central time |
| ZIP codes | 14 |
Which cities and towns are in Marshall County?
Marshall County has 1 place large enough for a full page on this site. They are ranked below by estimated population, together with whether each is incorporated, its density in people per square mile and the number of ZIP codes it uses. Marshalltown, IA is the largest.
| Place | Type | Population | Per sq mi | ZIPs |
|---|---|---|---|---|
| Marshalltown, IA | Incorporated | 26,666 | 1,380 | 1 |
The county also contains 13 smaller communities that appear here but do not have separate pages because their populations are too small for reliable data: State Center, Le Grand, Melbourne, Albion, Gilman, Rhodes, Liscomb, Laurel, Haverhill, Green Mountain, Clemons, Ferguson, St. Anthony. Residents of these places often depend on the county for services such as roads, courts and public health.
How large is Marshall County compared with other counties in Iowa?
Adding up the estimates for the places in our data gives 32,284 people, which ranks Marshall County 16th among 99 counties in Iowa. The average listed place has about 2,306 residents. The weighted density is about 1,314 people per square mile, which is suburban by our scale. These totals add up place estimates, so they can differ from the official county population, which includes people outside any listed place. See why population figures differ.
What ZIP codes are in Marshall County?
The places in Marshall County use 14 ZIP codes: 50005, 50051, 50078, 50106, 50120, 50141, 50142, 50148, 50158, 50162, 50234, 50239, 50247, 50632. Every code begins with 5, which is assigned to the Upper Midwest and northern Plains (Iowa, Minnesota, Montana, the Dakotas and Wisconsin). A ZIP code can cross county lines, so a code listed here may also serve addresses in a neighboring county. Use the ZIP code lookup to check a single code, or read how ZIP codes work.
Which counties are near Marshall County?
The closest counties by distance between the average locations of their places are listed below. The distance is a rough guide to how close the areas are, because county shapes vary widely.
- Jasper County, IA — about 24 miles south (center to center), 25,051 people in listed places
- Tama County, IA — about 24 miles east (center to center), 12,140 people in listed places
- Story County, IA — about 27 miles west (center to center), 91,191 people in listed places
- Grundy County, IA — about 27 miles northeast (center to center), 8,095 people in listed places
- Hardin County, IA — about 27 miles northwest (center to center), 12,616 people in listed places
- Poweshiek County, IA — about 34 miles southeast (center to center), 13,153 people in listed places
What does the FIPS code 19127 mean?
The first two digits, 19, identify Iowa, and the last three, 127, identify Marshall County inside that state. Government datasets use this code to join records without confusing counties that share a name. Our guide to counties and FIPS codes explains the numbering, and the Iowa hub lists every county we cover in the state.
Where to go next
Combined place populations are estimates from a compiled dataset and are not official county totals.