Residential delivery area · South Dakota
ZIP Code 57783: Spearfish, SD
ZIP code 57783 uses the postal name Spearfish, South Dakota and lies mostly in Lawrence County (96% of its land) with the rest in Butte County (Census 2020 ZIP-county file). About 17,000 people live there (Census Bureau, ACS 2020-2024), the more populous of Spearfish's 2 residential ZIP codes. Median household income is $74,844 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Spearfish (7%), North Spearfish (2%) and Mountain Plains (under 1%); 90% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Spearfish · 2 residential ZIPs
- County
- Lawrence County (96%); Butte County (4%)
- Census places
- Spearfish (7%); North Spearfish (2%) census-designated place; Mountain Plains (under 1%) census-designated place
- Micro area
- Spearfish, SD
- House district
- SD at large 119th Congress
- State
- South Dakota
- Time zone
- Mountain
- Land area
- 213.2 sq mi · 81 people per sq mi
Where is ZIP code 57783?
57783 centers on 44.456°, -103.925° and covers 213.2 square miles of land plus 0.1 of water. It borders 6 ZIP codes: 57799, 82712, 57779, 57754, 57793, 57717.
The map draws ZIP code areas only. For the streets inside 57783, 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 57783 compare with the rest of Spearfish?
| Measure | 57783 | In Spearfish | In Lawrence County | In SD |
|---|---|---|---|---|
| People (ACS 2020-2024) | 17,248 | 1st of 2 | 1st of 8 | 16th of 375 |
| Median household income | $75k | 1st of 1 | 2nd of 3 | 58th of 107 |
| Median home value | $373k | 1st of 1 | 1st of 5 | 9th of 109 |
Its median household income is higher than in 55% of U.S. residential ZIP codes, and it is denser than 50% 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 57783?
The 2020 Census counted 16,165 people in 57783; the ACS, which samples households over 2020-2024, estimates 17,248. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 17,248
- 2020 Census count
- 16,165
- Households
- 7,849
- Median age
- 41.0
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 57783?
Of the 17,248 people the ACS estimates in 57783, 18.3% are under 18 and 22.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (88.6%).
- Under 1818.3%
- 18 to 6459.7%
- 65 and older22.0%
- White, not Hispanic88.6%
- Other or two or more7.1%
- Hispanic or Latino3.6%
- Asian, not Hispanic0.5%
- Black, not Hispanic0.2%
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 57783 earn?
Median household income is $74,844 (ACS 2020-2024), the 2nd highest of the 3 ranked ZIP codes in Lawrence County.
- Median household income
- $74,844
- Income per person
- $46,492
- Below the poverty line
- 14.0%
- Unemployed (of the labor force)
- 1.9%
- Adults 25+ with a bachelor's degree
- 38.1%
- Adjusted gross income per tax return, 2022
- $100,2299,360 returns; wages 50% 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 57783?
FHFA's house price index for 57783, built from repeat sales and appraisals of the same homes, rose 98% from 2015 to 2025 and rose 58% from 2020 to 2025, and moved +1.7% in 2025.
- Median home value (owners' estimate)
- $373,300
- Median gross rent
- $965
- Homes owned by their occupants
- 58.6%
- Housing units
- 8,617
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 57783?
837 business establishments had a location in this ZIP code in 2023, 131 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction138
- Retail trade111
- Health care and social assistance88
- Other services (except public administration)88
- Professional, scientific, and technical services77
- Accommodation and food services72
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 57783?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 57799 | Spearfish | 568 | – | 3.9 mi |
| 82712 | Beulah, WY | 163 | – | 10.9 mi |
| 57779 | Saint Onge | 347 | – | 11.2 mi |
| 57754 | Lead | 3,749 | $66k | 14.0 mi |
| 57793 | Whitewood | 2,173 | $87k | 17.7 mi |
| 57717 | Belle Fourche | 8,983 | $78k | 33.0 mi |
| 57732 | Deadwood | 1,714 | $44k | 14.6 mi (near) |
| 82729 | Sundance, WY | 2,331 | $89k | 22.2 mi (near) |
| 57741 | Fort Meade | 141 | – | 22.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.