Residential delivery area · South Dakota
ZIP Code 57720: Buffalo, SD
ZIP code 57720 uses the postal name Buffalo, South Dakota and lies entirely in Harding County (Census 2020 ZIP-county file). About 520 people live there (Census Bureau, ACS 2020-2024). Median household income is $79,091 (Census Bureau, ACS 2020-2024). By Census place, 0% of its land lies in Buffalo; 100% is outside any Census place.
- ACS2020-24
- Census2020
- ZBP2023
- IRS2022
- Town
- Buffalo · its only residential ZIP
- County
- Harding County
- Census places
- Buffalo
- House district
- SD at large 119th Congress
- State
- South Dakota
- Time zone
- Mountain
- Land area
- 1,296.2 sq mi · under 1 person per sq mi
Where is ZIP code 57720?
57720 centers on 45.537°, -103.586° and covers 1,296.2 square miles of land plus 4.2 of water. It borders 8 ZIP codes: 57724, 57776, 57755, 57651, 58623, 57717, 57760, 58651.
The map draws ZIP code areas only. For the streets inside 57720, 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 57720 compare with the rest of Harding County?
| Measure | 57720 | In Harding County | In SD |
|---|---|---|---|
| People (ACS 2020-2024) | 518 | 5th of 12 | 205th of 375 |
| Median household income | $79k | not ranked | not ranked |
| Median home value | $157k | not ranked | not ranked |
57720's income and home value are not ranked: it has fewer than 1,000 residents (518). 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 3% 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 57720?
The 2020 Census counted 752 people in 57720; the ACS, which samples households over 2020-2024, estimates 518. Between the 2010 and 2020 censuses its population grew 15.5% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 518±86 (90% margin)
- 2020 Census count
- 752+15.5% since 2010 (651)
- Households
- 264
- Median age
- 52.3
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 57720?
Of the 518 people the ACS estimates in 57720, 20.1% are under 18 and 21.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (87.3%), then Other or two or more (10.6%).
- Under 1820.1%
- 18 to 6458.7%
- 65 and older21.2%
- White, not Hispanic87.3%
- Other or two or more10.6%
- Black, not Hispanic1.2%
- Hispanic or Latino1.0%
- 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 57720 earn?
Median household income is $79,091 (ACS 2020-2024). It is not measurably different from 2015-2019 ($76,687 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $79,091±$9,878
- Income per person
- $51,037
- Below the poverty line
- 12.0%
- Unemployed (of the labor force)
- 1.9%
- Adults 25+ with a bachelor's degree
- 25.0%
- Adjusted gross income per tax return, 2022
- $80,481310 returns; wages 53% 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 57720?
- Median home value (owners' estimate)
- $157,000
- Median gross rent
- $586
- Homes owned by their occupants
- 81.1%
- Housing units
- 378
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001).
What businesses are in 57720?
35 business establishments had a location in this ZIP code in 2023, 1 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction6
- Retail trade5
- Health care and social assistance5
- Mining, quarrying, and oil and gas extraction4
- Professional, scientific, and technical services4
- 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 57720?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 57724 | Camp Crook | 167 | $61k | 20.2 mi |
| 57776 | Redig | 0 | – | 21.1 mi |
| 57755 | Ludlow | 101 | $68k | 25.6 mi |
| 57651 | Reva | 191 | $95k | 27.0 mi |
| 58623 | Bowman, ND | 1,953 | $65k | 43.8 mi |
| 57717 | Belle Fourche | 8,983 | $78k | 44.3 mi |
| 57760 | Newell | 966 | $65k | 46.0 mi |
| 58651 | Rhame, ND | 513 | $76k | 50.4 mi |
| 59319 | Capitol, MT | 40 | – | 29.4 mi (near) |
| 57650 | Ralph | 17 | – | 33.5 mi (near) |
| 57649 | Prairie City | 273 | $85k | 35.8 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.