Residential delivery area · South Dakota
ZIP Code 57366: Parkston, SD
ZIP code 57366 uses the postal name Parkston, South Dakota and lies mostly in Hutchinson County (89% of its land) with the rest in Douglas County (Census 2020 ZIP-county file). About 2,600 people live there (Census Bureau, ACS 2020-2024). Median household income is $78,155 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Parkston (under 1%), Old Elm Spring Colony (under 1%) and Milltown (under 1%); 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Parkston · its only residential ZIP
- County
- Hutchinson County (89%); Douglas County (11%)
- Census places
- Parkston (under 1%); Old Elm Spring Colony (under 1%) census-designated place; Milltown (under 1%) census-designated place
- House district
- SD at large 119th Congress
- State
- South Dakota
- Time zone
- Central
- Land area
- 218.0 sq mi · 12 people per sq mi
Where is ZIP code 57366?
57366 centers on 43.392°, -97.947° and covers 218.0 square miles of land plus 0.3 of water. It borders 10 ZIP codes: 57331, 57334, 57376, 57052, 57330, 57332, 57311, 57313, 57029, 57328.
The map draws ZIP code areas only. For the streets inside 57366, 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 57366 compare with the rest of Hutchinson County?
| Measure | 57366 | In Hutchinson County | In SD |
|---|---|---|---|
| People (ACS 2020-2024) | 2,598 | 1st of 13 | 55th of 375 |
| Median household income | $78k | 1st of 5 | 47th of 107 |
| Median home value | $185k | 3rd of 6 | 79th of 109 |
Its median household income is higher than in 59% of U.S. residential ZIP codes, and it is denser than 19% 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 57366?
The 2020 Census counted 2,318 people in 57366; the ACS, which samples households over 2020-2024, estimates 2,598. Between the 2010 and 2020 censuses its population grew 4.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 2,598
- 2020 Census count
- 2,318+4.0% since 2010 (2,228)
- Households
- 1,035
- Median age
- 40.8
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 57366?
Of the 2,598 people the ACS estimates in 57366, 26.4% are under 18 and 19.1% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (94.0%).
- Under 1826.4%
- 18 to 6454.6%
- 65 and older19.1%
- White, not Hispanic94.0%
- Other or two or more4.3%
- Hispanic or Latino1.6%
- 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 57366 earn?
Median household income is $78,155 (ACS 2020-2024), the highest of the 5 ranked ZIP codes in Hutchinson County. It is not measurably different from 2015-2019 ($71,364 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $78,155±$16,574
- Income per person
- $40,340
- Below the poverty line
- 7.2%
- Unemployed (of the labor force)
- 2.3%
- Adults 25+ with a bachelor's degree
- 25.1%
- Adjusted gross income per tax return, 2022
- $82,4301,090 returns; wages 57% 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 57366?
FHFA's house price index for 57366, built from repeat sales and appraisals of the same homes, rose 108% from 2015 to 2025 and rose 76% from 2020 to 2025, and moved +6.3% in 2025.
- Median home value (owners' estimate)
- $184,600
- Median gross rent
- $762
- Homes owned by their occupants
- 76.1%
- Housing units
- 1,140
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 57366?
82 business establishments had a location in this ZIP code in 2023, 12 more than in 2018; the most are in other services (except public administration) (ZIP Code Business Patterns).
- Other services (except public administration)13
- Retail trade11
- Health care and social assistance11
- Construction7
- Wholesale trade7
- Finance and insurance6
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 57366?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 57331 | Dimock | 231 | $101k | 7.6 mi |
| 57334 | Ethan | 1,081 | $62k | 10.2 mi |
| 57376 | Tripp | 944 | $62k | 11.9 mi |
| 57052 | Olivet | 478 | $119k | 13.8 mi |
| 57330 | Delmont | 594 | $72k | 13.8 mi |
| 57332 | Emery | 903 | $70k | 18.2 mi |
| 57311 | Alexandria | 1,389 | $104k | 20.1 mi |
| 57313 | Armour | 1,220 | $89k | 21.4 mi |
| 57029 | Freeman | 2,155 | $74k | 24.2 mi |
| 57328 | Corsica | 1,290 | $87k | 24.9 mi |
| 57354 | Kaylor | 86 | – | 14.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.