Residential delivery area · South Dakota
ZIP Code 57646: Mound City, SD
ZIP code 57646 uses the postal name Mound City, South Dakota and lies entirely in Campbell County (Census 2020 ZIP-county file). About 270 people live there (Census Bureau, ACS 2020-2024). Median household income is $101,406 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Mound City; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- ZBP2023
- IRS2022
- Town
- Mound City · its only residential ZIP
- County
- Campbell County
- Census places
- Mound City
- House district
- SD at large 119th Congress
- State
- South Dakota
- Time zone
- Central
- Land area
- 128.4 sq mi · 2 people per sq mi
Where is ZIP code 57646?
57646 centers on 45.680°, -100.058° and covers 128.4 square miles of land plus 0.6 of water. It borders 5 ZIP codes: 57632, 57631, 57452, 57472, 57437.
The map draws ZIP code areas only. For the streets inside 57646, 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 57646 compare with the rest of Campbell County?
| Measure | 57646 | In Campbell County | In SD |
|---|---|---|---|
| People (ACS 2020-2024) | 272 | 5th of 6 | 273rd of 375 |
| Median household income | $101k | not ranked | not ranked |
| Median home value | $113k | not ranked | not ranked |
57646's income and home value are not ranked: it has fewer than 1,000 residents (272). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 6% of 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 57646?
The 2020 Census counted 207 people in 57646; the ACS, which samples households over 2020-2024, estimates 272. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 272±91 (90% margin)
- 2020 Census count
- 207
- Households
- 109
- Median age
- 37.5
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 57646?
Of the 272 people the ACS estimates in 57646, 23.2% are under 18 and 19.1% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (76.5%), then Hispanic or Latino (21.3%).
- Under 1823.2%
- 18 to 6457.7%
- 65 and older19.1%
- White, not Hispanic76.5%
- Hispanic or Latino21.3%
- Other or two or more2.2%
- 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 57646 earn?
Median household income is $101,406 (ACS 2020-2024).
- Median household income
- $101,406±$29,871
- Income per person
- $38,411
- Below the poverty line
- 12.9%
- Unemployed (of the labor force)
- 0.0%
- Adults 25+ with a bachelor's degree
- 47.0%
- Adjusted gross income per tax return, 2022
- $106,764110 returns; wages 30% 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 57646?
- Median home value (owners' estimate)
- $113,300
- Median gross rent
- –
- Homes owned by their occupants
- 88.1%
- Housing units
- 143
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001).
What businesses are in 57646?
4 business establishments had a location in this ZIP code in 2023, 2 fewer than in 2018 (ZIP Code Business Patterns).
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 57646?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 57632 | Herreid | 757 | $82k | 10.6 mi |
| 57631 | Glenham | 364 | $57k | 13.1 mi |
| 57452 | Java | 136 | $54k | 14.1 mi |
| 57472 | Selby | 1,165 | $62k | 17.6 mi |
| 57437 | Eureka | 1,074 | $49k | 22.2 mi |
| 57648 | Pollock | 465 | $61k | 21.3 mi (near) |
| 57428 | Bowdle | 567 | $64k | 24.2 mi (near) |
| 57658 | Wakpala | 319 | $23k | 24.3 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.