| Index | Brant Lake | South Dakota | National |
| Income per capita | $78,213 | $41,166 | $44,883 |
| Median household income | $127,409 | $77,914 | $81,333 |
| Median income owner occupied | $129,152 | $100,475 | $106,172 |
| Median income renter occupied | $0 | $45,187 | $52,080 |
| Median earnings male | $106,324 | $52,540 | $54,343 |
| Median earnings female | $0 | $36,073 | $38,439 |
| Unemployment rate | 0.0% | 2.9% | 4.9% |
| Poverty level | 0.0% | 14.0% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 0.0% | 0.0% |
| Manufacturing sector | 0.0% | 0.0% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 84.6% | 84.6% |
| Public administration | 0.0% | 0.0% |
| Transportation, warehousing & utilities | 0.0% | 0.0% |
| Education, health & social services | 15.4% | 15.4% |
| Other | 0.0% | 0.0% |
| City | Population | Household Income | National Avg. |
| Lake Madison, SD | 833 | $144,053 | 77.1% |
| Colman, SD | 707 | $123,482 | 51.8% |
| Baltic, SD | 1,198 | $118,374 | 45.5% |
| Dell Rapids, SD | 3,782 | $108,133 | 33.0% |
| Colton, SD | 770 | $105,982 | 30.3% |
| Brant Lake, SD | 68 | $127,409 | 56.7% |
| City | Population | Household Income | National Avg. |
| Rodney, IA | 68 | $50,723 | 37.6% |
| Paderborn, IL | 68 | $0 | 100.0% |
| Agenda, KS | 68 | $60,603 | 25.5% |
| Raymond, KS | 68 | $67,005 | 17.6% |
| Roseland, KS | 68 | $116,550 | 43.3% |
| Brant Lake, SD | 68 | $127,409 | 56.7% |