ZIP Code 57730 has segments in 2 Counties (Custer, Pennington).
Businesses Addresses: 302
PO Box Addresses: 594
Residential Addresses: 2,553
Multi-Family Addresses: 89
Single Family Addresses: 2,464
The ZIP Code maps and database are updated 4 times per year. Database updated: March 1, 2026, Maps updated: May 1, 2024.
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Custer, SD 57730 Data & Demographics
Source: 2020-2024 American Community Survey 5-Year Estimates
POPULATION
Total Population
5,596 (100%)
Population Density
11 per sq mi
Diversity Index1
24
INCOME
Median Household Income
$83,469
Per Capita Income
$50,472
Median Home Value
$378,800
HOUSING
Total HU (Housing Units)
3,346 (100%)
Owner Occupied HU
2,196 (65.6%)
Renter Occupied HU
537 (16.0%)
Vacant Housing Units
613 (18.3%)
HOUSEHOLDS
Total Households
2,733
Average Household Size
1.97
Family Households
1,938 (70.9%)
NOTES
The Diversity Index estimates the likelihood that two persons chosen at random from the same area belong to different race or ethnic groups, based on five groups: Hispanic/Latino, Non-Hispanic White, Non-Hispanic Black, Non-Hispanic Asian, and Non-Hispanic Other/Multiracial. A value of 0 indicates the population belongs entirely to one group. Higher values indicate a more evenly mixed population. Calculated from U.S. Census Bureau ACS 5-year estimates (table B03002).
Custer, SD 57730 - Peer Comparisons by Rank and Percentile
The table below compares 57730 to the other 33,772 ZIP Codes in the United States by rank and percentile using 2020-2024 American Community Survey 5-Year Estimates 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.
