| Langeloth, Pennsylvania | |
| Settlement Type: | Census-designated place |
| Pushpin Map: | USA Pennsylvania#USA |
| Pushpin Map Caption: | Location within the U.S. state of Pennsylvania |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Pennsylvania |
| Subdivision Type2: | County |
| Subdivision Name2: | Washington |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 2.70 |
| Area Land Km2: | 2.70 |
| Area Water Km2: | 0.00 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 659 |
| Population Density Km2: | 244.44 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 40.3633°N -80.4103°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 15054 |
| Blank Name: | FIPS code |
| Blank Info: | 42-41376 |
| Blank1 Name: | GNIS feature ID |
| Area Total Sq Mi: | 1.04 |
| Area Land Sq Mi: | 1.04 |
| Area Water Sq Mi: | 0.00 |
| Population Density Sq Mi: | 633.05 |
Langeloth is a census-designated place in Smith Township, Washington County, Pennsylvania. Langeloth has been assigned the ZIP code 15054. As of the 2010 census, the population was 717 residents.
Langeloth began as a coal mining company town. Langeloth Metallurgical Company, now a unit of Centerra Gold, is the town's largest employer. It was the birthplace of noted former college football coach Barry Alvarez.