ZIP code · Alexandria · South Dakota · United States
ZIP code 57311 — Alexandria
ZIP code 57311 serves Alexandria, South Dakota.
- Postal code
- 57311Single source Value from one source, not cross-checked.
- City
- Alexandria
- County
- Hanson FIPS 46061
- State
- South Dakota
- Country
- United States
- Coordinates
- 43.6684, -97.7563 — precision precise (locality)
View on OpenStreetMap - Population
- 1,509 (ZCTA, ACS 5-year)
- Population density
- 8 / sq mi
- Land area
- 188.4 sq mi (487.8 km²) (ZCTA, ACS 5-year)
- Median household income
- $99,432
- Per-capita income
- $43,776
- Median age
- 37.3
- Households
- 481
- Housing units
- 558
- Median home value
- $191,900
- Median gross rent
- $729 / month
- Congressional district
- SD At-large (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
- 605Telephone 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 57311 with another ZIP · ZIPs within 25 miles · distance from 57311
Map of ZIP code 57311
Climate — monthly normals
Warmest month Jul (avg high 84°F), coldest Jan (avg low 6°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 25 | 31 | 44 | 58 | 69 | 79 | 84 | 82 | 75 | 60 | 43 | 29 |
| Avg low °F | 6 | 10 | 21 | 32 | 44 | 56 | 60 | 57 | 49 | 35 | 21 | 10 |
| Precip in | 0.5 | 0.7 | 1.1 | 2.9 | 3.6 | 4.0 | 3.1 | 3.0 | 2.8 | 2.0 | 0.9 | 0.6 |
NOAA 1991–2020 climate normals from the nearest station: ALEXANDRIA (2.4 mi) · NOAA NCEI
Places in ZIP 57311
- 1 schools
- 3 parks
- 1 post offices
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