| Index | Watertown | South Dakota | National |
| Income per capita | $29,346 | $27,516 | $29,829 |
| Median household income | $52,145 | $52,078 | $55,322 |
| Median income owner occupied | $68,245 | $66,299 | $70,586 |
| Median income renter occupied | $35,000 | $30,800 | $35,192 |
| Median earnings male | $39,775 | $35,140 | $36,919 |
| Median earnings female | $22,307 | $24,451 | $26,250 |
| Unemployment rate | 2.0% | 2.8% | 4.7% |
| Poverty level | 15.4% | 14.0% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 8.1% | 8.1% |
| Manufacturing sector | 23.4% | 23.4% |
| Financial & insurance services | 6.5% | 6.5% |
| Wholesale & retail services | 20.4% | 20.4% |
| Public administration | 5.5% | 5.5% |
| Transportation, warehousing & utilities | 5.9% | 5.9% |
| Education, health & social services | 6.6% | 6.6% |
| Other | 22.6% | 22.6% |
| City | Population | Household Income | National Avg. |
| Castlewood, SD | 582 | $60,893 | 10.1% |
| Florence, SD | 371 | $58,409 | 5.6% |
| Hazel, SD | 143 | $54,375 | 1.7% |
| Goodwin, SD | 102 | $52,917 | 4.3% |
| South Shore, SD | 256 | $47,206 | 14.7% |
| Watertown, SD | 22,249 | $52,145 | 5.7% |
| City | Population | Household Income | National Avg. |
| Hudson, OH | 22,249 | $133,418 | 141.2% |
| Prairie Village, KS | 22,255 | $88,196 | 59.4% |
| Mont-Royal, QC | 22,238 | n/a | |
| Mustang, OK | 22,228 | $74,980 | 35.5% |
| Frederickson, WA | 22,290 | $91,602 | 65.6% |
| Watertown, SD | 22,249 | $52,145 | 5.7% |