Karns City, Pennsylvania
| Karns City, Pennsylvania | |
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| Borough | |
Calumet Penreco oil refinery on Petrolia Street
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 Karns City
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| Coordinates: 40°59′42″N 79°43′33″W / 40.99500°N 79.72583°WCoordinates: 40°59′42″N 79°43′33″W / 40.99500°N 79.72583°W | |
| Country | United States |
| State | Pennsylvania |
| County | Butler |
| Settled | 1874 |
| Incorporated | 1875 |
| Government | |
| • Type | Borough Council |
| Area | |
| • Total | 0.36 sq mi (0.94 km2) |
| • Land | 0.36 sq mi (0.94 km2) |
| • Water | 0.0 sq mi (0.0 km2) |
| Population (2010) | |
| • Total | 209 |
| • Density | 576/sq mi (222.5/km2) |
| Time zone | Eastern (EST) (UTC-5) |
| • Summer (DST) | EDT (UTC-4) |
| Zip code | 16041 |
Karns City is a borough in Butler County, Pennsylvania, United States. The population was 209 at the 2010 census.
Karns City is located in eastern Butler County at 40°59′42″N 79°43′33″W / 40.995048°N 79.725743°W, in the valley of the South Branch of Bear Creek, a tributary of the Allegheny River. Pennsylvania Route 268 passes through the borough, leading north 1.7 miles (2.7 km) to Petrolia and south 3.7 miles (6.0 km) to Chicora.
According to the United States Census Bureau, Karns City has a total area of 0.36 square miles (0.94 km2), all of it land.
As of the census of 2000, there were 244 people, 89 households, and 67 families residing in the borough. The population density was 645.8 people per square mile (247.9/km2). There were 96 housing units at an average density of 254.1 per square mile (97.5/km2). The racial makeup of the borough was 99.59% White and 0.41% African American. Hispanic or Latino of any race were 0.41% of the population.
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