ZIP Codes of Lawrence County, SD

Population & People
Population & People
Total Population
26,197
Household Income
Household Income
Median Income
$69,516
Housing
Housing
Total Housing Units
14,335
Business & Economy
Business & Economy
Total Businesses
1,283
Employment
Employment
Employment Rate
62.43%
Education
Education
Bachelor's Degree+
32.98%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 7 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:7 ZIP Codes (6 Standard, 0 PO Box, 1 Unique) [See All]
Area Codes:507 / 605 / 924
Timezone:Mountain (GMT -07:00)
Local Time:2:13:43 PM
Population:26,197 [See All]
FIPS:46081
CBSA:Spearfish, SD
Land Area:862 sq mi
Water Area:5 sq mi
Coordinates:44.3950, -103.7503
Quick Link:
https://www.zip-codes.com/county/sd-lawrence.asp
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Among South Dakota's 10 most populous counties
#8 of 82 counties with 26,197 residents.
Striking education divide
Bachelor's share spans 18.8% to 67.4% — a 49-point gap.

Standout ZIPs in this County


Most Populous
Spearfish · 17,248 people
65.8% of county total
Highest Income
Whitewood · $87,351 median
1.3× county average
Largest Land Area
Lead · 296.6 sq mi
Spans the most ground
Fastest Growth
Spearfish · 18.8% (10-yr)
14,515 → 17,248 residents
Most Educated
Spearfish · 38.1% bachelor's+
4,670 of 12,253 adults 25+

Things worth knowing about Lawrence County


26,197 residents live across 7 ZIPs covering 862 sq mi, served by 6 distinct USPS-recognized cities.

Population moved from 23,981 to 26,197 from 2014 to 2024 — a +9.2% change. 4 ZIPs gained residents, 3 lost.

The county's wealthiest ZIP 57793 (Whitewood, $87,351 median) and poorest ZIP 57732 (Deadwood, $43,636) are 20.3 miles apart — a 2.0× income gap across local geography.

Median home values vary 2.5× across this county — from $218,000 in 57754 (Lead) to $555,600 in 57759 (Nemo).

Density varies 480× across the county — from 6 people/sq mi in 57759 (Nemo) to 3,012 in 57799 (Spearfish).

Educational attainment ranges from 18.8% bachelor's+ in 57793 (Whitewood) to 67.4% in 57779 (Saint Onge) — the breadth of educational profiles across the area.

Within South Dakota, this is the #8 most populous of 82 counties and ranks #55 for median household income with the #15 fastest decade growth .

Hosts 1 single-entity Unique ZIP: 57799Black Hills State University .

Weighted by population, the typical household earns about $72,539 across the county — reflecting what a typical resident sees, not a simple ZIP average.

33.0% of adults age 25+ hold a bachelor's degree or higher (6,283 of 19,049 reporting). The most-educated ZIPs cluster around Spearfish.

6 Standard delivery, 0 PO Box only, 1 single-entity Unique ZIPs serve this county.

Stories about Lawrence County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
862
square miles
Avg density
30.4
people per sq mi
Population
26,197
across 7 ZIPs
Lead
296.6 sq mi
3,749 residents
Spearfish
206.9 sq mi
17,248 residents
Whitewood
136.6 sq mi
2,173 residents

Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Spearfish

All ZIP Codes in Lawrence County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
57783SpearfishStandard17,248$74,844206.918.8%
57754LeadStandard3,749$66,250296.610.0%
57793WhitewoodStandard2,173$87,351136.6-3.5%
57732DeadwoodStandard1,714$43,636120.5-25.4%
57799SpearfishUnique5680.26.4%
57759NemoStandard398$75,50063.4-47.8%
57779Saint OngeStandard34737.962.9%

Adjacent & Nearby Counties