Comparison to Surrounding Areas
The median household income ($-1) for 57421 is less than 57430 ($70,484), 57432 ($112,765), 57446 ($44,375), 57454 ($81,250), and Marshall County ($78,156).
| 57421 | $-1 |
| Marshall County | $78,156 |
Get Median Household Income for all Zip Codes in South Dakota.
The average household income ($-1) for 57421 is less than 57430 ($90,358), 57432 ($100,730), 57446 ($64,647), 57454 ($101,878), and Marshall County ($103,822).
| 57421 | $-1 |
| Marshall County | $103,822 |
Get Average Household Income for all Zip Codes in South Dakota.
The per-capita income for 57421 is $33,005. The per capita income ($33,005) for 57421 is less than the per capita income for 57430 ($40,863), 57446 ($40,291), 57454 ($37,937), and Marshall County ($43,791). But it's more than 57432 ($29,936).
| 57421 | $33,005 |
| Marshall County | $43,791 |
Get Per-Capita Income for all Zip Codes in South Dakota.
0% of households make over $200,000 a year. The percent high income households (0.0%) for 57421 is less than 57430 (5.7%), 57432 (4.6%), 57454 (7.6%), and Marshall County (8.5%). And it's the same as 57446 (0.0%).
| 57421 | 0.0% |
| Marshall County | 8.5% |
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 | |
|---|---|---|---|---|
| 57421 | $-1 | $-1 | $-1 | $-1 |
| Marshall County | $51,250 | $85,500 | $104,286 | $59,097 |
Get Median Household Income by Age of Householder for all Zip Codes in South Dakota.
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All income statistics above are the most current, comparable income statistics available from the US Census Bureau and are from the American Community Survey 2024 5-year estimates. You can find this information and other demographics for 57421 on the US Census Bureau’s website. These values are in 2024 inflation-adjusted dollars and were downloaded on 29 January 2026.
Margins of error for the income data are:
| Median Household Income | Average Household Income | Per Capita Income | High Income Households | Median Household Income by Age of Householder | ||||
|---|---|---|---|---|---|---|---|---|
| under 25 | 25 to 44 | 45 to 64 | 65+ | |||||
| 57421 | +/-$-1 | +/-$-1 | +/-$10,102 | +/-61.3% | +/-$-1 | +/-$-1 | +/-$-1 | +/-$-1 |
| Marshall County | +/-$10,504 | +/-$16,666 | +/-$6,542 | +/-4.0% | +/-$24,251 | +/-$14,835 | +/-$32,138 | +/-$9,994 |