| ZIP Codes: | 20 ZIP Codes (17 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Codes: | 582 / 724 / 814 / 878 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:32 PM |
| Population: | 108,127 [See All] |
| FIPS: | 42085 |
| CBSA: | Hermitage, PA |
| Land Area: | 672 sq mi |
| Water Area: | 15 sq mi |
| Coordinates: | 41.3151, -80.3109 |
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108,127 residents live across 20 ZIPs covering 672 sq mi, served by 20 distinct USPS-recognized cities.
Population moved from 113,936 to 108,127 from 2014 to 2024 — a -5.1% change. 2 ZIPs gained residents, 18 lost.
The county's wealthiest ZIP 16133 (Jackson Center, $76,713 median) and poorest ZIP 16161 (Wheatland, $40,536) are 20.6 miles apart — a 1.9× income gap across local geography.
Median home values vary 3.2× across this county — from $67,700 in 16161 (Wheatland) to $213,700 in 16127 (Grove City).
Density varies 70× across the county — from 46 people/sq mi in 16114 (Clarks Mills) to 3,249 in 16146 (Sharon).
Educational attainment ranges from 15.2% bachelor's+ in 16121 (Farrell) to 38.7% in 16127 (Grove City) — the breadth of educational profiles across the area.
Within Pennsylvania, this is the #30 most populous of 67 counties and ranks #60 for median household income .
Weighted by population, the typical household earns about $62,006 across the county — reflecting what a typical resident sees, not a simple ZIP average.
25.5% of adults age 25+ hold a bachelor's degree or higher (19,845 of 77,974 reporting).
17 Standard delivery, 3 PO Box only, 0 single-entity Unique ZIPs serve this county.
Mercer County lost 5.1% of residents between 2014 and 2024. ZIPs that shed the largest share:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 16125 | Greenville | Standard | 17,178 | $54,787 | 105.8 | -4.0% |
| 16148 | Hermitage | Standard | 16,545 | $70,490 | 31.9 | -0.8% |
| 16127 | Grove City | Standard | 15,117 | $72,429 | 74.9 | -5.5% |
| 16146 | Sharon | Standard | 12,936 | $45,670 | 4.0 | -6.7% |
| 16137 | Mercer | Standard | 12,490 | $71,250 | 110.1 | -3.0% |
| 16150 | Sharpsville | Standard | 6,856 | $56,334 | 27.3 | -6.4% |
| 16159 | West Middlesex | Standard | 4,455 | $69,391 | 27.5 | -3.0% |
| 16121 | Farrell | Standard | 4,199 | $42,595 | 2.2 | -13.5% |
| 16134 | Jamestown | Standard | 3,992 | $63,519 | 54.1 | -0.5% |
| 16145 | Sandy Lake | Standard | 2,660 | $67,321 | 50.5 | 4.1% |
| 16154 | Transfer | Standard | 2,539 | $57,870 | 28.0 | -13.8% |
| 16153 | Stoneboro | Standard | 2,234 | $63,750 | 40.7 | -16.1% |
| 16130 | Hadley | Standard | 1,810 | $58,750 | 30.6 | -7.0% |
| 16124 | Fredonia | Standard | 1,462 | $55,455 | 27.3 | -18.6% |
| 16133 | Jackson Center | Standard | 1,425 | $76,713 | 28.6 | -5.9% |
| 16161 | Wheatland | PO Box | 819 | $40,536 | 0.9 | -2.3% |
| 16114 | Clarks Mills | Standard | 579 | $69,500 | 12.6 | 5.3% |
| 16311 | Carlton | Standard | 421 | $70,938 | 14.7 | -26.1% |
| 16113 | Clark | PO Box | 358 | $60,000 | 0.4 | -6.3% |
| 16151 | Sheakleyville | PO Box | 52 | $73,958 | 0.0 | -25.7% |