Comparison to Surrounding Areas
The median household income ($97,969) for 57751 is less than the median household income for 57744 ($106,250). But it's more than 57702 ($91,457), 57730 ($83,469), 57745 ($88,194), Custer County ($84,112), Pennington County ($74,517), and Keystone town ($64,702).
| 57751 | $97,969 |
| Keystone town | $64,702 |
| Custer County | $84,112 |
| Pennington County | $74,517 |
Get Median Household Income for all Zip Codes in South Dakota.
The average household income ($108,642) for 57751 is less than the average household income for 57702 ($135,695), 57730 ($110,337), 57744 ($122,101), 57745 ($113,049), and Custer County ($110,413). But it's more than Pennington County ($99,289) and Keystone town ($83,955).
| 57751 | $108,642 |
| Keystone town | $83,955 |
| Custer County | $110,413 |
| Pennington County | $99,289 |
Get Average Household Income for all Zip Codes in South Dakota.
The per-capita income for 57751 is $43,414. The per capita income ($43,414) for 57751 is less than the per capita income for 57702 ($59,230), 57730 ($50,472), 57744 ($51,512), and Custer County ($52,898). But it's more than 57745 ($40,454), Pennington County ($42,302), and Keystone town ($32,157).
| 57751 | $43,414 |
| Keystone town | $32,157 |
| Custer County | $52,898 |
| Pennington County | $42,302 |
Get Per-Capita Income for all Zip Codes in South Dakota.
6.7% of households make over $200,000 a year. The percent high income households (6.7%) for 57751 is less than the percent high income households for 57702 (16.7%), 57744 (16.5%), 57745 (8.2%), Custer County (9.2%), and Pennington County (8.9%). But it's more than 57730 (6.4%) and Keystone town (6.5%).
| 57751 | 6.7% |
| Keystone town | 6.5% |
| Custer County | 9.2% |
| Pennington County | 8.9% |
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 | |
|---|---|---|---|---|
| 57751 | $-1 | $67,188 | $141,042 | $93,000 |
| Keystone town | $-1 | $64,667 | $63,750 | $86,250 |
| Custer County | $-1 | $93,636 | $113,448 | $50,472 |
| Pennington County | $46,525 | $80,275 | $89,511 | $56,451 |
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 57751 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+ | |||||
| 57751 | +/-$34,026 | +/-$17,975 | +/-$8,183 | +/-5.5% | +/-$-1 | +/-$13,460 | +/-$45,761 | +/-$43,515 |
| Keystone town | +/-$11,275 | +/-$17,862 | +/-$12,895 | +/-6.7% | +/-$-1 | +/-$7,330 | +/-$42,327 | +/-$66,885 |
| Custer County | +/-$3,932 | +/-$15,797 | +/-$7,321 | +/-3.4% | +/-$-1 | +/-$17,526 | +/-$18,838 | +/-$18,591 |
| Pennington County | +/-$2,445 | +/-$3,964 | +/-$1,644 | +/-1.0% | +/-$3,988 | +/-$4,232 | +/-$4,593 | +/-$4,385 |