ZIP code
51003
Alton, IA
51003 covers Alton in Sioux County, with 1,815 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 51003. Methodology
ZIP code map of 51003
About ZIP code 51003
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 51003. Not ACS. Methodology
People in 51003
Race
- White1,565
- Black or African American27
- American Indian or Alaska Native12
- Asian6
- Native Hawaiian and Pacific Islander5
- Other race40
- Two or more races64
Hispanic or Latino (any race): 91
Age
- Under 10241
- 10 to 19272
- 20 to 29172
- 30 to 39216
- 40 to 49189
- 50 to 59219
- 60 to 69248
- 70 to 79117
- 80 and older45
Income and housing in 51003
Education
- High school graduate95.5%
- Bachelor's degree26.6%
- Graduate degree4.5%
Places covering 51003
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.
- Alton72.6%
- Orange City0.0%
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.
- Sioux 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
27.4% of this ZIP is outside city limits (a real overlap row, not missing data).
Population history for 51003
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2005 | 1,739 | |
| 2006 | 1,635 | |
| 2007 | 1,685 | |
| 2008 | 1,633 | |
| 2009 | 1,647 | |
| 2010 | 1,616 | |
| 2011 | 1,734 | 1,639 |
| 2012 | 1,585 | 1,620 |
| 2013 | 1,649 | 1,630 |
| 2014 | 1,616 | 1,650 |
| 2015 | 1,712 | 1,640 |
| 2016 | 1,746 | 1,640 |
| 2017 | 1,761 | 1,640 |
| 2018 | 1,737 | 1,640 |
| 2019 | 1,713 | 1,630 |
| 2020 | 1,920 | 1,640 |
| 2021 | 1,732 | 1,640 |
| 2022 | 1,761 | 1,620 |
| 2023 | 1,815 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 51003
12 nearest ZIP centroids (any distance)
- 51041Orange City5.2 miPop 7,173 · Income $84,115
- 51022Granville7.1 miPop 966 · Income $91,133
- 51238Hospers7.5 miPop 1,483 · Income $82,634
- 51036Maurice10.4 miPop 483 · Income $111,563
- 51045Oyens12.3 miPop 75 · Income $96,250
- 51250Sioux Center13.1 miPop 9,887 · Income $90,238
- 51050Remsen13.2 miPop 2,909 · Income $101,691
- 51234Boyden14.1 miPop 1,090 · Income $81,458
- 51201Sheldon14.6 miPop 6,226 · Income $70,592
- 51231Archer14.7 miPop 543 · Income $105,388
- 51046Paullina15.7 miPop 1,407 · Income $81,389
- 51031Le Mars16.4 miPop 12,785 · Income $74,978
ZIP centroids within 2 miles
No other ZIP codes within 2 miles of 51003, measured by Census internal-point centroids. Try a wider radius.
ZIPs within 2 miles of this place
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ZIP code 51003 FAQ
- What city is ZIP code 51003 in?
- 51003 is in Alton, IA.
- What county is 51003 in?
- 51003 is in Sioux County.
- What is the median household income in 51003?
- The median household income in 51003 is $85,909.
- Which ZIP codes are near 51003?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 51003.