Onawa, IA ZIP Codes
One ZIP code serves Onawa, Iowa: 51040. Together they are home to 3,500 residents in 1,555 households.
Onawa city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 2,839 |
| Households | 1,256 |
| Median household income | $62,143 |
| Median home value | $145,800 |
| Median age | 35.5 |
| Median rent | $1,037 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 3,500 |
| Households (sum of ZIP codes) | 1,555 |
| Median household income, range across ZIP codes | $71,179 (51040) to $71,179 (51040) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $71,179 |
| Homeowners | 75.3% |
| Households with kids under 18 | 27.4% |
| Moved in the past year | 6.5% |
| Carrier routes in EDDM2GO's route library | 4 routes, 1,555 homes (1 of 1 ZIP codes) |
Every ZIP code in Onawa
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 51040 | Onawa | 3,500 | 1,555 | $71,179 | $151,600 | 75.3% | 27.4% | 6.5% | 4 | 1,687 | 4% of its land; mailing city |
A ZIP code is listed for Onawa when at least 10% of its land lies inside Onawa city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Onawa. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Onawa.
Counties
- Monona County — 14 ZIP codes
Price a mailing to Onawa ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Onawa, IA?
- 51040. A ZIP code is listed for Onawa when at least 10% of its land lies inside Onawa city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Onawa.
- What is the population of Onawa, IA?
- The Census Bureau counts 2,839 residents inside Onawa city limits (ACS 2020–2024). The 1 ZIP code that serve Onawa hold 3,500 residents in all.
- What is the median household income in Onawa, IA?
- $62,143 inside Onawa city limits, per the Census Bureau. Across its ZIP codes the medians run from $71,179 to $71,179.
- How many carrier routes and mailboxes are in Onawa, IA?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 4 carrier routes reaching 1,555 residential and 131 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.