| Index | Groton | South Dakota | National |
| Income per capita | $48,538 | $41,166 | $44,883 |
| Median household income | $116,300 | $77,914 | $81,333 |
| Median income owner occupied | $125,079 | $100,475 | $106,172 |
| Median income renter occupied | $69,859 | $45,187 | $52,080 |
| Median earnings male | $72,766 | $52,540 | $54,343 |
| Median earnings female | $52,339 | $36,073 | $38,439 |
| Unemployment rate | 0.6% | 2.9% | 4.9% |
| Poverty level | 6.5% | 14.0% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 7.2% | 7.2% |
| Manufacturing sector | 21.1% | 21.1% |
| Financial & insurance services | 3.6% | 3.6% |
| Wholesale & retail services | 16.6% | 16.6% |
| Public administration | 7.4% | 7.4% |
| Transportation, warehousing & utilities | 6.5% | 6.5% |
| Education, health & social services | 16.2% | 16.2% |
| Other | 19.4% | 19.4% |
| City | Population | Household Income | National Avg. |
| Stratford, SD | 43 | $90,753 | 11.6% |
| Pierpont, SD | 198 | $89,051 | 9.5% |
| Langford, SD | 538 | $78,131 | 3.9% |
| Columbia, SD | 171 | $77,853 | 4.3% |
| Andover, SD | 81 | $60,703 | 25.4% |
| Groton, SD | 1,915 | $116,300 | 43.0% |
| City | Population | Household Income | National Avg. |
| Holley, NY | 1,915 | $85,193 | 4.7% |
| St. Johnsville, NY | 1,915 | $53,845 | 33.8% |
| Lake City, TN | 1,915 | $34,326 | 57.8% |
| Ixonia, WI | 1,915 | $116,898 | 43.7% |
| Reform, AL | 1,914 | $50,750 | 37.6% |
| Groton, SD | 1,915 | $116,300 | 43.0% |