ZIP code 51040: Onawa, IA
51040 is a ZIP code in Onawa, Iowa, mainly in Monona County. About 3,500 people live here.
- Population
- 3,500
- Median household income
- $71,179
- Typical home value
- $157,000+2.8% in 12 months
- Median rent
- $947gross, per month
- Median age
- 37.6
- Homeowners
- 75.3%of occupied homes
Shaded: ZIP code 51040's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 51040 details
| City | Onawa |
|---|---|
| State | Iowa |
| County | Monona County |
| Metro area | Not in a metro or micro area |
| Time zone | Central Time (UTC−6), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 129.5 sq mi, plus 1.6 sq mi of water |
| Population density | 27 people per sq mi |
| Bachelor's degree or higher | 19.9% of adults 25+ |
| Average commute | 18.3 minutes |
| Center coordinates | 42.03254, -96.06871 |
Median rent in 51040 by bedrooms
| Size | Median gross rent |
|---|---|
| 2 bedrooms | $943/mo |
| 3 bedrooms | $1,111/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 51040
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 51010 | Castana, IA | 8.1 mi | 425 |
| 51523 | Blencoe, IA | 8.1 mi | 379 |
| 51063 | Whiting, IA | 9.3 mi | 1,072 |
| 68020 | Decatur, NE | 10.9 mi | 644 |
| 51558 | Moorhead, IA | 12.6 mi | 549 |
| 51545 | Little Sioux, IA | 12.8 mi | 267 |
| 51051 | Rodney, IA | 13.1 mi | 39 |
| 51572 | Soldier, IA | 13.8 mi | 371 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 51040?
A typical home in ZIP code 51040 is worth about $157,000 (Zillow Home Value Index). The median household here earns $71,179 a year. See what buying here would cost per month, with Iowa average taxes and insurance filled in.
Monthly payment for a $157,000 homeWhat can a $71,179 income afford?Rental property numbers
About ZIP code 51040
What city is ZIP code 51040?
ZIP code 51040 is in Onawa, IA, in Monona County.
What county is ZIP code 51040 in?
51040 is mainly in Monona County, Iowa.
What is the population of ZIP code 51040?
About 3,500 people live in ZIP code 51040, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 51040 in?
51040 is in Central Time (UTC−6). It observes daylight saving time.