Residential delivery area · South Dakota
ZIP Code 57365: Oacoma, SD
ZIP code 57365 uses the postal name Oacoma, South Dakota and lies entirely in Lyman County (Census 2020 ZIP-county file). About 600 people live there (Census Bureau, ACS 2020-2024). Median household income is $76,000 (Census Bureau, ACS 2020-2024). By Census place, 4% of its land lies in Oacoma; 96% is outside any Census place.
- ACS2020-24
- Census2020
- ZBP2023
- IRS2022
- Town
- Oacoma · its only residential ZIP
- County
- Lyman County
- Census places
- Oacoma
- House district
- SD at large 119th Congress
- State
- South Dakota
- Time zone
- Central
- Land area
- 62.5 sq mi · 10 people per sq mi
Where is ZIP code 57365?
57365 centers on 43.811°, -99.416° and covers 62.5 square miles of land plus 9.5 of water. It borders 2 ZIP codes: 57325, 57569.
The map draws ZIP code areas only. For the streets inside 57365, 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 57365 compare with the rest of Lyman County?
| Measure | 57365 | In Lyman County | In SD |
|---|---|---|---|
| People (ACS 2020-2024) | 599 | 4th of 9 | 187th of 375 |
| Median household income | $76k | not ranked | not ranked |
| Median home value | $218k | not ranked | not ranked |
57365's income and home value are not ranked: it has fewer than 1,000 residents (599). 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 16% 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 57365?
The 2020 Census counted 456 people in 57365; the ACS, which samples households over 2020-2024, estimates 599. Between the 2010 and 2020 censuses its population fell 12.6% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 599±118 (90% margin)
- 2020 Census count
- 456−12.6% since 2010 (522)
- Households
- 264
- Median age
- 41.2
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 57365?
Of the 599 people the ACS estimates in 57365, 23.2% are under 18 and 26.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (96.2%).
- Under 1823.2%
- 18 to 6450.4%
- 65 and older26.4%
- White, not Hispanic96.2%
- Other or two or more2.0%
- Hispanic or Latino1.8%
- 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 57365 earn?
Median household income is $76,000 (ACS 2020-2024). It is not measurably different from 2015-2019 ($80,173 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $76,000±$28,470
- Income per person
- $56,943
- Below the poverty line
- 7.0%
- Unemployed (of the labor force)
- 5.8%
- Adults 25+ with a bachelor's degree
- 23.6%
- Adjusted gross income per tax return, 2022
- $66,592240 returns; wages 56% 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 57365?
- Median home value (owners' estimate)
- $218,400
- Median gross rent
- $883
- Homes owned by their occupants
- 79.5%
- Housing units
- 333
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001).
What businesses are in 57365?
24 business establishments had a location in this ZIP code in 2023, 4 more than in 2018; the most are in accommodation and food services (ZIP Code Business Patterns).
- Accommodation and food services9
- Retail trade8
- Construction3
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 57365?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 57325 | Chamberlain | 3,335 | $80k | 5.5 mi |
| 57569 | Reliance | 497 | $75k | 7.6 mi |
| 57370 | Pukwana | 894 | $59k | 12.4 mi (near) |
| 57534 | Hamill | 130 | $33k | 20.9 mi (near) |
| 57544 | Kennebec | 421 | $79k | 21.9 mi (near) |
| 57339 | Fort Thompson | 1,390 | $46k | 21.9 mi (near) |
| 57355 | Kimball | 1,120 | $63k | 24.3 mi (near) |
| 57341 | Gann Valley | 79 | – | 24.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.