ZIP code · Archer · Iowa · United States
ZIP code 51231 — Archer
ZIP code 51231 serves Archer, Iowa.
- Postal code
- 51231Single source Value from one source, not cross-checked.
- City
- Archer
- County
- O'Brien FIPS 19141
- State
- Iowa
- Country
- United States
- Coordinates
- 43.1179, -95.7417 — precision precise (locality)
View on OpenStreetMap - Population
- 543 (ZCTA, ACS 5-year)
- Population density
- 22 / sq mi
- Land area
- 24.2 sq mi (62.7 km²) (ZCTA, ACS 5-year)
- Median household income
- $105,388
- Per-capita income
- $23,221
- Median age
- 16.3
- Households
- 152
- Housing units
- 154
- Median home value
- $179,600
- Congressional district
- IA-4 (119th Congress)
- USDA hardiness zone
- 5a (-20 to -15 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
- Area code
- 712Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 51231 with another ZIP · ZIPs within 25 miles · distance from 51231
Map of ZIP code 51231
Climate — monthly normals
Warmest month Jul (avg high 83°F), coldest Jan (avg low 6°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 24 | 28 | 42 | 57 | 69 | 79 | 83 | 80 | 74 | 60 | 43 | 29 |
| Avg low °F | 6 | 10 | 22 | 34 | 47 | 58 | 62 | 60 | 50 | 37 | 23 | 12 |
| Precip in | 0.9 | 1.1 | 1.9 | 3.4 | 4.5 | 4.9 | 3.4 | 3.5 | 3.3 | 2.5 | 1.6 | 1.2 |
NOAA 1991–2020 climate normals from the nearest station: SANBORN (5.9 mi) · NOAA NCEI
Places in ZIP 51231
- 1 parks
- 1 libraries
- 1 post offices
- 2 places of worship
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page