Residential delivery area · South Dakota
ZIP Code 57551: Martin, SD
ZIP code 57551 uses the postal name Martin, South Dakota and lies entirely in Bennett County (Census 2020 ZIP-county file). About 2,100 people live there (Census Bureau, ACS 2020-2024). Median household income is $70,096 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Martin; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- ZBP2023
- IRS2022
- Town
- Martin · its only residential ZIP
- County
- Bennett County
- Census places
- Martin
- House district
- SD at large 119th Congress
- State
- South Dakota
- Time zone
- Mountain
- Land area
- 753.1 sq mi · 3 people per sq mi
Where is ZIP code 57551?
57551 centers on 43.192°, -101.708° and covers 753.1 square miles of land plus 4.6 of water. It borders 10 ZIP codes: 57714, 57574, 57577, 57547, 57716, 69218, 57752, 57560, 57566, 69343.
The map draws ZIP code areas only. For the streets inside 57551, 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 57551 compare with the rest of Bennett County?
| Measure | 57551 | In Bennett County | In SD |
|---|---|---|---|
| People (ACS 2020-2024) | 2,084 | 1st of 7 | 66th of 375 |
| Median household income | $70k | 1st of 1 | 73rd of 107 |
| Median home value | $162k | 1st of 1 | 88th of 109 |
Its median household income is higher than in 47% of U.S. residential ZIP codes, and it is denser than 7% 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 57551?
The 2020 Census counted 2,232 people in 57551; the ACS, which samples households over 2020-2024, estimates 2,084. Between the 2010 and 2020 censuses its population fell 2.1% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 2,084±307 (90% margin)
- 2020 Census count
- 2,232−2.1% since 2010 (2,279)
- Households
- 666
- Median age
- 36.0
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 57551?
Of the 2,084 people the ACS estimates in 57551, 31.3% are under 18 and 18.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (49.5%), then Other or two or more (44.6%).
- Under 1831.3%
- 18 to 6450.2%
- 65 and older18.5%
- White, not Hispanic49.5%
- Other or two or more44.6%
- Hispanic or Latino3.2%
- Asian, not Hispanic2.4%
- Black, not Hispanic0.3%
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 57551 earn?
Median household income is $70,096 (ACS 2020-2024). It is not measurably different from 2015-2019 ($60,216 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $70,096±$16,798
- Income per person
- $25,744
- Below the poverty line
- 20.5%
- Unemployed (of the labor force)
- 7.1%
- Adults 25+ with a bachelor's degree
- 25.6%
- Adjusted gross income per tax return, 2022
- $56,973830 returns; wages 66% 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 57551?
- Median home value (owners' estimate)
- $161,900
- Median gross rent
- $613
- Homes owned by their occupants
- 64.9%
- Housing units
- 833
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001).
What businesses are in 57551?
56 business establishments had a location in this ZIP code in 2023, 8 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade12
- Construction11
- Health care and social assistance7
- Other services (except public administration)7
- Information4
- Accommodation and food services4
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 57551?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 57714 | Allen | 1,144 | – | 14.1 mi |
| 57574 | Tuthill | 73 | <$2,500 | 16.9 mi |
| 57577 | Wanblee | 940 | $21k | 23.1 mi |
| 57547 | Long Valley | 383 | $79k | 25.0 mi |
| 57716 | Batesland | 201 | – | 25.6 mi |
| 69218 | Merriman, NE | 429 | $79k | 29.2 mi |
| 57752 | Kyle | 1,553 | $83k | 29.7 mi |
| 57560 | Norris | 391 | – | 30.3 mi |
| 57566 | Parmelee | 1,184 | $14k | 32.2 mi |
| 69343 | Gordon, NE | 2,544 | $60k | 37.8 mi |
| 57750 | Interior | 365 | – | 30.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.