Residential delivery area · South Dakota
ZIP Code 57311: Alexandria, SD
ZIP code 57311 uses the postal name Alexandria, South Dakota and lies entirely in Hanson County (Census 2020 ZIP-county file). About 1,400 people live there (Census Bureau, ACS 2020-2024). Median household income is $103,839 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Alexandria (under 1%), Oak Lane Colony (under 1%), Rockport Colony (under 1%), Rosedale Colony (under 1%) and Farmer (0%); more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2021
- ZBP2023
- IRS2022
- Town
- Alexandria · its only residential ZIP
- County
- Hanson County
- Census places
- Alexandria (under 1%); Oak Lane Colony (under 1%) census-designated place; Rockport Colony (under 1%) census-designated place; Rosedale Colony (under 1%) census-designated place
- Micro area
- Mitchell, SD
- House district
- SD at large 119th Congress
- State
- South Dakota
- Time zone
- Central
- Land area
- 188.4 sq mi · 7 people per sq mi
Where is ZIP code 57311?
57311 centers on 43.651°, -97.765° and covers 188.4 square miles of land plus 0.2 of water. It borders 8 ZIP codes: 57332, 57340, 57374, 57334, 57301, 57321, 57366, 57349.
The map draws ZIP code areas only. For the streets inside 57311, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 57311 compare with the rest of Hanson County?
| Measure | 57311 | In Hanson County | In SD |
|---|---|---|---|
| People (ACS 2020-2024) | 1,389 | 2nd of 7 | 107th of 375 |
| Median household income | $104k | 1st of 2 | 8th of 107 |
| Median home value | $187k | 3rd of 3 | 78th of 109 |
Its median household income is higher than in 83% of U.S. residential ZIP codes, and it is denser than 14% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 57311?
The 2020 Census counted 1,522 people in 57311; the ACS, which samples households over 2020-2024, estimates 1,389. Between the 2010 and 2020 censuses its population fell 5.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 1,389±169 (90% margin)
- 2020 Census count
- 1,522−5.8% since 2010 (1,616)
- Households
- 455
- Median age
- 41.5
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 57311?
Of the 1,389 people the ACS estimates in 57311, 21.0% are under 18 and 20.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (90.6%).
- Under 1821.0%
- 18 to 6458.8%
- 65 and older20.2%
- White, not Hispanic90.6%
- Other or two or more7.1%
- Hispanic or Latino2.2%
- Black, not Hispanic0.0%
- Asian, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 57311 earn?
Median household income is $103,839 (ACS 2020-2024). It rose from $69,223 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $103,839
- Income per person
- $45,968
- Below the poverty line
- 2.5%
- Unemployed (of the labor force)
- 0.7%
- Adults 25+ with a bachelor's degree
- 24.7%
- Adjusted gross income per tax return, 2022
- $82,082610 returns; wages 64% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 57311?
- Median home value (owners' estimate)
- $186,800
- Median gross rent
- $781
- Homes owned by their occupants
- 89.5%
- Housing units
- 517
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 57311?
27 business establishments had a location in this ZIP code in 2023, 3 fewer than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction5
- Finance and insurance5
- Retail trade3
- Other services (except public administration)3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 57311?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 57332 | Emery | 903 | $70k | 8.8 mi |
| 57340 | Fulton | 244 | $59k | 10.8 mi |
| 57374 | Spencer | 272 | $79k | 10.9 mi |
| 57334 | Ethan | 1,081 | $62k | 14.1 mi |
| 57301 | Mitchell | 19,104 | $66k | 14.4 mi |
| 57321 | Canova | 390 | $93k | 18.9 mi |
| 57366 | Parkston | 2,598 | $78k | 20.1 mi |
| 57349 | Howard | 1,513 | $75k | 27.8 mi |
| 57319 | Bridgewater | 881 | $70k | 16.4 mi (near) |
| 57331 | Dimock | 231 | $101k | 18.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.