ZIP code
51040
Onawa, IA
51040 covers Onawa in Monona County, with 3,388 people in the ACS 2023 estimate.
Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 51040. Methodology
ZIP code map of 51040
About ZIP code 51040
Acceptable cities: Turin
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 51040. Not ACS. Methodology
People in 51040
Race
- White3,222
- Black or African American11
- American Indian or Alaska Native114
- Asian16
- Native Hawaiian and Pacific Islander2
- Other race17
- Two or more races155
Hispanic or Latino (any race): 65
Age
- Under 10409
- 10 to 19464
- 20 to 29380
- 30 to 39389
- 40 to 49369
- 50 to 59452
- 60 to 69456
- 70 to 79347
- 80 and older271
Income and housing in 51040
Education
- High school graduate93.8%
- Bachelor's degree17.6%
- Graduate degree5.0%
Places covering 51040
Cities and places — Population overlap
Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
Counties — Population overlap
Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.
- Monona County100.0%
ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
15.8% of this ZIP is outside city limits (a real overlap row, not missing data).
Population history for 51040
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2005 | 3,279 | |
| 2006 | 3,174 | |
| 2007 | 3,498 | |
| 2008 | 3,131 | |
| 2009 | 3,177 | |
| 2010 | 3,187 | |
| 2011 | 4,023 | 3,172 |
| 2012 | 3,998 | 3,070 |
| 2013 | 3,763 | 2,990 |
| 2014 | 3,576 | 3,090 |
| 2015 | 3,557 | 3,050 |
| 2016 | 3,531 | 2,970 |
| 2017 | 3,506 | 3,010 |
| 2018 | 3,543 | 2,950 |
| 2019 | 3,500 | 2,950 |
| 2020 | 3,458 | 2,980 |
| 2021 | 3,450 | 2,860 |
| 2022 | 3,422 | 2,810 |
| 2023 | 3,388 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 51040
12 nearest ZIP centroids (any distance)
- 51010Castana8.1 miPop 416 · Income $92,083
- 51523Blencoe8.1 miPop 356 · Income $80,909
- 51063Whiting9.3 miPop 1,109 · Income $70,714
- 68020Decatur10.9 miPop 655 · Income $51,250
- 51558Moorhead12.6 miPop 680 · Income $78,393
- 51545Little Sioux12.8 miPop 258 · Income $67,083
- 51051Rodney13.1 miPop 48 · Income $52,188
- 51572Soldier13.8 miPop 379 · Income $70,000
- 68039Macy15.0 miPop 1,153 · Income $44,063
- 51026Hornick15.4 miPop 1,050 · Income $82,411
- 51056Smithland15.5 miPop 332 · Income $100,395
- 51055Sloan15.6 miPop 1,189 · Income $75,833
ZIP centroids within 2 miles
No other ZIP codes within 2 miles of 51040, measured by Census internal-point centroids. Try a wider radius.
ZIPs within 2 miles of this place
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ZIP code 51040 FAQ
- What city is ZIP code 51040 in?
- 51040 is in Onawa, IA.
- What county is 51040 in?
- 51040 is in Monona County.
- What is the median household income in 51040?
- The median household income in 51040 is $60,642.
- Which ZIP codes are near 51040?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 51040.