Comparison to Surrounding Areas
The median household income ($78,646) for 57231 is less than the median household income for 57233 ($82,917). But it's more than 57353 ($75,625), 57323 ($51,250), 57349 ($75,179), 57051 ($56,250), 57221 ($73,988), 57249 ($63,182), 57278 ($70,208), Kingsbury County ($74,000), and De Smet city ($67,321).
| 57231 | $78,646 |
| De Smet city | $67,321 |
| Kingsbury County | $74,000 |
Get Median Household Income for all Zip Codes in South Dakota.
The average household income ($96,356) for 57231 is less than the average household income for 57221 ($125,017), 57233 ($102,846), 57349 ($123,898), and 57353 ($101,044). But it's more than 57051 ($78,961), 57249 ($80,758), 57278 ($92,047), 57323 ($68,030), Kingsbury County ($88,285), and De Smet city ($86,103).
| 57231 | $96,356 |
| De Smet city | $86,103 |
| Kingsbury County | $88,285 |
Get Average Household Income for all Zip Codes in South Dakota.
The per-capita income for 57231 is $41,058. The per capita income ($41,058) for 57231 is less than the per capita income for 57051 ($50,626), 57221 ($42,426), 57323 ($43,037), 57349 ($53,182), 57353 ($42,452), and De Smet city ($41,346). But it's more than 57233 ($18,478), 57249 ($37,442), 57278 ($25,003), and Kingsbury County ($37,027).
| 57231 | $41,058 |
| De Smet city | $41,346 |
| Kingsbury County | $37,027 |
Get Per-Capita Income for all Zip Codes in South Dakota.
7.6% of households make over $200,000 a year. The percent high income households (7.6%) for 57231 is less than the percent high income households for 57221 (12.9%), 57233 (21.1%), and 57349 (8.1%). But it's more than 57249 (5.2%), 57323 (2.4%), 57353 (4.5%), 57051 (3.2%), 57278 (3.9%), Kingsbury County (5.7%), and De Smet city (5.9%).
| 57231 | 7.6% |
| De Smet city | 5.9% |
| Kingsbury County | 5.7% |
Get High Income Households for all Zip Codes in South Dakota.
| under 25 years | 25 to 44 years | 45 to 64 years | 65 years and over | |
|---|---|---|---|---|
| 57231 | $55,938 | $100,288 | $110,469 | $51,136 |
| De Smet city | $56,667 | $102,115 | $92,679 | $50,114 |
| Kingsbury County | $55,521 | $79,524 | $102,546 | $52,353 |
Get Median Household Income by Age of Householder for all Zip Codes in South Dakota.
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All income statistics above are the most current, comparable income statistics available from the US Census Bureau and are from the American Community Survey 2024 5-year estimates. You can find this information and other demographics for 57231 on the US Census Bureau’s website. These values are in 2024 inflation-adjusted dollars and were downloaded on 29 January 2026.
Margins of error for the income data are:
| Median Household Income | Average Household Income | Per Capita Income | High Income Households | Median Household Income by Age of Householder | ||||
|---|---|---|---|---|---|---|---|---|
| under 25 | 25 to 44 | 45 to 64 | 65+ | |||||
| 57231 | +/-$13,703 | +/-$8,045 | +/-$3,756 | +/-2.7% | +/-$32,462 | +/-$16,964 | +/-$12,303 | +/-$3,466 |
| De Smet city | +/-$15,848 | +/-$8,729 | +/-$3,822 | +/-3.1% | +/-$49,041 | +/-$23,202 | +/-$21,270 | +/-$9,998 |
| Kingsbury County | +/-$6,554 | +/-$4,741 | +/-$1,685 | +/-1.6% | +/-$7,435 | +/-$11,855 | +/-$12,452 | +/-$10,837 |