| Index | Fairfield | Montana | National |
| Income per capita | $26,786 | $27,309 | $29,829 |
| Median household income | $63,365 | $48,380 | $55,322 |
| Median income owner occupied | $63,269 | $60,564 | $70,586 |
| Median income renter occupied | $70,119 | $30,651 | $35,192 |
| Median earnings male | $51,375 | $31,798 | $36,919 |
| Median earnings female | $31,625 | $21,711 | $26,250 |
| Unemployment rate | 0.2% | 3.6% | 4.7% |
| Poverty level | 13.0% | 14.9% | 15.1% |
| Labour Type | Male | Female |
| Construction industry | 26.8% | 26.8% |
| Manufacturing sector | 0.0% | 0.0% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 11.8% | 11.8% |
| Public administration | 13.4% | 13.4% |
| Transportation, warehousing & utilities | 6.3% | 6.3% |
| Education, health & social services | 18.1% | 18.1% |
| Other | 18.1% | 18.1% |
| City | Population | Household Income | National Avg. |
| Simms, MT | 338 | $83,317 | 50.6% |
| Choteau, MT | 1,878 | $52,500 | 5.1% |
| Sun River, MT | 41 | $48,250 | 12.8% |
| Power, MT | 153 | $41,964 | 24.1% |
| Fort Shaw, MT | 138 | $0 | 100.0% |
| Fairfield, MT | 690 | $63,365 | 14.5% |
| City | Population | Household Income | National Avg. |
| McRae, AR | 690 | $31,667 | 42.8% |
| Willow Valley, AZ | 690 | $30,781 | 44.4% |
| Wabasso, FL | 690 | $39,226 | 29.1% |
| Avon, IL | 690 | $35,833 | 35.2% |
| Beverly Shores, IN | 690 | $97,823 | 76.8% |
| Fairfield, MT | 690 | $63,365 | 14.5% |
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