| Index | Harrold | South Dakota | National |
| Income per capita | $45,471 | $41,166 | $44,883 |
| Median household income | $92,998 | $77,914 | $81,333 |
| Median income owner occupied | $98,090 | $100,475 | $106,172 |
| Median income renter occupied | $91,464 | $45,187 | $52,080 |
| Median earnings male | $76,809 | $52,540 | $54,343 |
| Median earnings female | $55,731 | $36,073 | $38,439 |
| Unemployment rate | 0.0% | 2.9% | 4.9% |
| Poverty level | 3.6% | 14.0% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 15.8% | 15.8% |
| Manufacturing sector | 39.5% | 39.5% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 0.0% | 0.0% |
| Public administration | 5.3% | 5.3% |
| Transportation, warehousing & utilities | 13.2% | 13.2% |
| Education, health & social services | 2.6% | 2.6% |
| Other | 23.7% | 23.7% |
| City | Population | Household Income | National Avg. |
| Highmore, SD | 852 | $86,423 | 6.3% |
| Blunt, SD | 391 | $80,189 | 1.4% |
| Harrold, SD | 112 | $92,998 | 14.3% |
| City | Population | Household Income | National Avg. |
| Arlington, AZ | 112 | $0 | 100.0% |
| Vilas, CO | 112 | $86,518 | 6.4% |
| Fraser, IA | 112 | $86,819 | 6.7% |
| Gravity, IA | 112 | $62,278 | 23.4% |
| Pontoosuc, IL | 112 | $63,973 | 21.3% |
| Harrold, SD | 112 | $92,998 | 14.3% |