Mercer County, Pennsylvania
| Mercer County, Pennsylvania | |
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Mercer County Courthouse (1909)
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 Location in the U.S. state of Pennsylvania |
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 Pennsylvania's location in the U.S. |
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| Founded | November 7, 1803 |
| Seat | Mercer |
| Largest city | Hermitage |
| Area | |
| • Total | 683 sq mi (1,769 km2) |
| • Land | 673 sq mi (1,743 km2) |
| • Water | 10 sq mi (26 km2), 1.5% |
| Population (est.) | |
| • (2015) | 114,234 |
| • Density | 170/sq mi (66/km²) |
| Congressional district | 3rd |
| Time zone | Eastern: UTC-5/-4 |
| Website | www |
Mercer County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 116,638. Its county seat is Mercer, and its largest city is Hermitage. The county was created in 1800 and later organized in 1803.
Mercer County is included in the Youngstown-Warren-Boardman, OH-PA Metropolitan Statistical Area.
According to the U.S. Census Bureau, the county has a total area of 683 square miles (1,770 km2), of which 673 square miles (1,740 km2) is land and 10 square miles (26 km2) (1.5%) is water.
As of the census of 2000, there were 120,293 people, 46,712 households, and 32,371 families residing in the county. The population density was 179 people per square mile (69/km²). There were 49,859 housing units at an average density of 74 per square mile (29/km²). The racial makeup of the county was 93.13% White, 5.25% Black or African American, 0.11% Native American, 0.40% Asian, 0.02% Pacific Islander, 0.17% from other races, and 0.91% from two or more races. 0.67% of the population were Hispanic or Latino of any race. 24.5% were of German, 12.0% Italian, 10.5% Irish, 9.3% English and 6.8% American ancestry according to Census 2000.
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