| Index | Castlewood | South Dakota | National |
| Income per capita | $40,406 | $41,166 | $44,883 |
| Median household income | $89,263 | $77,914 | $81,333 |
| Median income owner occupied | $96,352 | $100,475 | $106,172 |
| Median income renter occupied | $47,050 | $45,187 | $52,080 |
| Median earnings male | $65,579 | $52,540 | $54,343 |
| Median earnings female | $46,803 | $36,073 | $38,439 |
| Unemployment rate | 0.9% | 2.9% | 4.9% |
| Poverty level | 1.7% | 14.0% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 5.3% | 5.3% |
| Manufacturing sector | 27.8% | 27.8% |
| Financial & insurance services | 2.6% | 2.6% |
| Wholesale & retail services | 21.2% | 21.2% |
| Public administration | 3.3% | 3.3% |
| Transportation, warehousing & utilities | 7.9% | 7.9% |
| Education, health & social services | 8.6% | 8.6% |
| Other | 23.2% | 23.2% |
| City | Population | Household Income | National Avg. |
| Lake Poinsett, SD | 496 | $124,159 | 52.7% |
| Lake Norden, SD | 548 | $95,433 | 17.3% |
| Estelline, SD | 888 | $88,119 | 8.3% |
| Goodwin, SD | 104 | $78,915 | 3.0% |
| Watertown, SD | 22,909 | $78,834 | 3.1% |
| Castlewood, SD | 599 | $89,263 | 9.8% |
| City | Population | Household Income | National Avg. |
| Norwood, CO | 599 | $78,840 | 3.1% |
| Bowen, IL | 599 | $87,213 | 7.2% |
| Patoka, IL | 599 | $79,423 | 2.3% |
| White City, KS | 599 | $59,559 | 26.8% |
| Cedarville, MD | 599 | $139,166 | 71.1% |
| Castlewood, SD | 599 | $89,263 | 9.8% |