57783 ZIP Code Profile, Map, Data & Demographics

ZIP Code Type: STANDARD
County: Lawrence County
Centroid: Latitude 44.495, Longitude -103.868
Time Zone: Mountain Time Zone (UTC -7 hours)
Observes DST: Yes

ZIP Code 57783 has segments in 2 Counties (Butte, Lawrence).

Businesses Addresses: 978
PO Box Addresses: 445
Residential Addresses: 7,630

Multi-Family Addresses: 749
Single Family Addresses: 6,881

The ZIP Code maps and database are updated 4 times per year.
Database updated: October 1, 2025, Maps updated: May 1, 2024.

Spearfish, SD 57783 Data & Demographics (As of July 1, 2025)

POPULATION
Total Population	17,534 (100%)
Population in Households	17,278 (98.5%)
Population in Families	12,259 (69.9%)
Population in Group Quarters¹	256 ( 1.5%)
Population Density	91
Diversity Index²	26


INCOME
Median Household Income	$72,062
Average Household Income	$108,784
% of Income for Mortgage⁴	31%
Per Capita Income	$49,365
Wealth Index⁵	98
Socioeconomic Status Index⁶	Moderate (55.6)

HOUSING
Total HU (Housing Units)	8,896 (100%)
Owner Occupied HU	4,819 (54.2%)
Renter Occupied HU	3,135 (35.2%)
Vacant Housing Units	942 (10.6%)
Median Home Value	$357,200
Average Home Value	$433,585
Housing Affordability Index³	74

HOUSEHOLDS
Total Households	7,954
Average Household Size	2.17
Family Households	4,365
Average Family Size	3.00

NOTES

Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

Spearfish, SD 57783 - Peer Comparisons by Rank and Percentile

The table below compares 57783 to the other 371 ZIP Codes in South Dakota by rank and percentile using July 1, 2025 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

GROWTH RATE / YEAR	2020-2025	2025-2030
Population	1.83%	1.34%
Households	2.07%	1.45%
Families		1.25%
Median Household Income		2.29%
Per Capita Income		2.59%
Owner Occupied HU		2.29%

Variable Description	Rank	Percentile
Total Population	# 15	96th
Population Density	# 36	91st
Median Household Income	# 209	44th
Housing Affordability Index	# 82	22nd
Per Capita Income	# 51	87th
Diversity Index	# 136	64th

57783 ZIP Code Profile, Map, Data & Demographics

ZIP Code 57783: Basic Data & USPS Preferred City Name

Spearfish, SD 57783 Data & Demographics (As of July 1, 2025)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

Spearfish, SD 57783 - Peer Comparisons by Rank and Percentile

Popular Places Near ZIP Code 57783

Use HTL Address Research for a South Dakota Address and get...

Quick & Easy Ways to...

South Dakota Census Data Comparison Tool

More Tools and Resources:

Lawrence County