| Index | St. Marys | Pennsylvania | National |
| Income per capita | $48,268 | $45,532 | $44,883 |
| Median household income | $82,390 | $80,478 | $81,333 |
| Median income owner occupied | $104,988 | $100,571 | $106,172 |
| Median income renter occupied | $43,407 | $46,621 | $52,080 |
| Median earnings male | $59,445 | $57,544 | $54,343 |
| Median earnings female | $47,779 | $39,017 | $38,439 |
| Unemployment rate | 4.5% | 4.7% | 4.9% |
| Poverty level | 9.2% | 13.3% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 8.8% | 8.8% |
| Manufacturing sector | 49.8% | 49.8% |
| Financial & insurance services | 0.5% | 0.5% |
| Wholesale & retail services | 15.2% | 15.2% |
| Public administration | 1.6% | 1.6% |
| Transportation, warehousing & utilities | 1.7% | 1.7% |
| Education, health & social services | 5.4% | 5.4% |
| Other | 15.2% | 15.2% |
| City | Population | Household Income | National Avg. |
| Kersey, PA | 1,044 | $110,055 | 35.3% |
| Byrnedale, PA | 612 | $99,026 | 21.8% |
| Crenshaw, PA | 329 | $95,033 | 16.8% |
| Weedville, PA | 469 | $86,230 | 6.0% |
| James City, PA | 257 | $69,662 | 14.3% |
| St. Marys, PA | 12,663 | $82,390 | 1.3% |
| City | Population | Household Income | National Avg. |
| Palmer Town, MA | 12,662 | $102,725 | 26.3% |
| Minneola, FL | 12,664 | $108,608 | 33.5% |
| Beatrice, NE | 12,664 | $62,585 | 23.1% |
| Valencia West, AZ | 12,659 | $94,365 | 16.0% |
| Lincolnwood, IL | 12,655 | $135,871 | 67.1% |
| St. Marys, PA | 12,663 | $82,390 | 1.3% |