The median income of Washington County residents was $30,602 per year, adjusted for inflation. It had 84,100 households with a population of 207,547.
The county with the highest median resident income in the state was Chester County with $41,522 per year after adjusting for inflation – $10,920 more than Washington County. It had 189,592 households with a population of 517,156.
The county with the lowest median resident income in the state was Forest County with $16,617 per year after adjusting for inflation – $13,985 less than Washington County. It had 1,631 households with a population of 7,351.
Pennsylvania counties by earnings per resident (2018)
| Rank | County | Earnings per resident |
|---|---|---|
| 1 | Chester County | $41,522 |
| 2 | Montgomery County | $41,205 |
| 3 | Bucks County | $39,030 |
| 4 | Cumberland County | $34,643 |
| 5 | Delaware County | $34,466 |
| 6 | Butler County | $32,870 |
| 7 | Dauphin County | $32,134 |
| 8 | Allegheny County | $31,816 |
| 9 | Perry County | $31,805 |
| 10 | York County | $31,518 |
| 11 | Northampton County | $31,179 |
| 12 | Franklin County | $30,730 |
| 13 | Lancaster County | $30,615 |
| 14 | Washington County | $30,602 |
| 15 | Adams County | $30,392 |
| 16 | Lehigh County | $30,335 |
| 17 | Westmoreland County | $30,241 |
| 18 | Lebanon County | $30,070 |
| 19 | Elk County | $29,590 |
| 20 | Berks County | $29,468 |
| 21 | Beaver County | $29,376 |
| 22 | Montour County | $29,044 |
| 23 | Pike County | $28,580 |
| 24 | Monroe County | $27,945 |
| 25 | Fulton County | $27,869 |
| 26 | Carbon County | $27,683 |
| 27 | Wyoming County | $27,621 |
| 28 | Susquehanna County | $27,269 |
| 29 | Luzerne County | $27,054 |
| 30 | Bradford County | $27,048 |
| 31 | Schuylkill County | $27,018 |
| 32 | Snyder County | $26,939 |
| 33 | Lackawanna County | $26,592 |
| 34 | Armstrong County | $26,524 |
| 35 | Columbia County | $26,520 |
| 36 | Juniata County | $26,492 |
| 37 | Lycoming County | $26,103 |
| 38 | Northumberland County | $26,005 |
| 39 | Blair County | $25,892 |
| 40 | Warren County | $25,820 |
| 41 | Erie County | $25,792 |
| 42 | Wayne County | $25,762 |
| 43 | Greene County | $25,681 |
| 44 | Centre County | $25,552 |
| 45 | Venango County | $25,441 |
| 46 | Lawrence County | $25,431 |
| 47 | Crawford County | $25,380 |
| 48 | Jefferson County | $25,369 |
| 49 | Philadelphia County | $25,340 |
| 50 | Cambria County | $25,198 |
| 51 | Tioga County | $25,123 |
| 52 | Bedford County | $25,110 |
| 53 | Mercer County | $24,987 |
| 54 | Somerset County | $24,831 |
| 55 | Sullivan County | $24,737 |
| 56 | Cameron County | $24,733 |
| 57 | Mifflin County | $24,715 |
| 58 | McKean County | $24,380 |
| 59 | Fayette County | $24,286 |
| 60 | Huntingdon County | $24,013 |
| 61 | Clinton County | $24,003 |
| 62 | Clearfield County | $23,955 |
| 63 | Potter County | $23,381 |
| 64 | Clarion County | $23,297 |
| 65 | Union County | $23,289 |
| 66 | Indiana County | $22,295 |
| 67 | Forest County | $16,617 |
* All values are inflation-adjusted
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