State profile · SD
South Dakota ZIP Codes
Demographics, income, and housing across every ZIP code in South Dakota, benchmarked against all 50 states, DC and Puerto Rico.
- 371
- ZIP codes
- 813,464
- Population
- $76,584
- Avg ZIP income
- 66
- Counties
The verdict
Texas leads ZIP coverage at 1,935 ZCTAs (#1 of 52). That is not the income board: New Jersey's unweighted average ZIP household income is $121,992 (#1 of 52) on 595 ZCTAs. South Dakota sits #37 of 52 by ZIP count at income #28.
- Texas
- ZIP-count #1 (1,935)
- New Jersey
- income #1 ($121,992)
- #37
- of 52 by ZIP count
- #28
- of 52 by avg income
ZIP-count and income are separate boards among 52 reporting states and territories. Income is the unweighted mean of each ZIP's ACS 2019–2023 median household income, so a rural code counts the same as a dense metro.
Above-median income on a shorter ZIP list (371 codes · 360 cities). Household income averages $76,584 (28th of 52 by avg ZIP income). Compact geography means city pages carry more of the contrast than a giant county table; open the largest city first, then one smaller market, rather than scanning every ZIP.
The largest city, Sioux Falls (161,141), holds a moderate share (~20%) of state ZIP population. Expect a primary metro plus a long tail of mid-size markets: the top-cities chart and county RankBars both matter, and a two-ZIP compare inside vs outside Sioux Falls usually beats reading the state average alone.
Compact ZIP geography: the state page is closer to a directory than a mega-atlas. Prefer the largest city page and its primary ZIP over scanning every county, and keep the FAQ answers as the quick census totals.
Largest cities in South Dakota
Top 10 cities by population in South Dakota
Total resident population aggregated from every ZIP code the Census assigns to each city.
- Sioux Falls
Sioux Falls, SD
161,141 residents
- Rapid City
Rapid City, SD
90,647 residents
- Aberdeen 30,061
Aberdeen, SD
30,061 residents
- Watertown 24,983
Watertown, SD
24,983 residents
- Brookings 24,530
Brookings, SD
24,530 residents
- Yankton 19,121
Yankton, SD
19,121 residents
- Mitchell 18,375
Mitchell, SD
18,375 residents
- Pierre 16,309
Pierre, SD
16,309 residents
- Spearfish 14,950
Spearfish, SD
14,950 residents
- Huron 14,534
Huron, SD
14,534 residents
What this shows Sioux Falls leads, but several peers sit close enough that this top-10 chart is a shortlist, not a single-city story – compare two of those metros before trusting the state mean.
Counties in South Dakota
Which cities have the most ZIPs in South Dakota?
Side-by-side: Compare 57701 vs 57106 →
ZIP Codes in South Dakota
More SD ZIP codes
Official Data Resources for South Dakota
Compact ZIP geography: start at Census ACS for South Dakota, then BLS wages for the labor-market side of the same small map.
Frequently Asked Questions
Is South Dakota compact enough to browse ZIP by ZIP?
Yes – 371 codes and 66 counties put South Dakota in compact geography. Prefer the largest city page and its primary ZIP; the roll-ups here are quick census totals, not a substitute for opening one urban and one thin-edge code.
Does South Dakota's above-median ZIP income mean every market is expensive?
No. The unweighted ZIP mean ($76,584) still mixes dense suburbs with thinner edges, and home values average $191,839. Open the densest metro and one thin-edge county before reading affordability from the state line alone.
Which South Dakota cities should I open first?
Start with Sioux Falls (161,141, ~20% of ZIP population), then one mid-size market from the largest-cities chart. A two-ZIP compare inside vs outside Sioux Falls usually beats reading the state average alone. Other large markets include Rapid City, Aberdeen, Watertown.
Take this with you
What to do with South Dakota's numbers, next.
- See how South Dakota compares to a neighboring state on the same Census fields Compare states
- Check where South Dakota's ZIP codes rank nationally on income, education, or homeownership View national rankings
- Save a ZIP code to your shortlist to track alongside others you're considering View your shortlist
Figures describe 2019–2023 ACS 5-Year Estimates aggregated from ZIP Code Tabulation Areas (ZCTAs), Census Bureau approximations of USPS ZIP codes, not any single address.
Source: U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2019–2023); USPS ZIP Code Tabulation Areas via the HUD USPS Crosswalk.
Read our methodology to see how this data is sourced, computed, and verified.