Confluence is a borough in Somerset County, Pennsylvania, United States. It is part of the Somerset, Pennsylvania, Metropolitan Statistical Area. The population was 834 at the 2000 census.
Confluence is at 39°48′36″N 79°21′24″W (39.809997, -79.356692).
Confluence is named for the juncture of the Casselman River and Laurel Hill Creek with the Youghiogheny River. It therefore provides many opportunities for boating and fishing (and hiking, as Pennsylvania's highest point, Mount Davis, is located nearby).
According to the United States Census Bureau, the borough has a total area of 1.6 square miles (4.1 km2), of which, 1.6 square miles (4.1 km2) of it is land and 0.1 square miles (0.26 km2) of it (3.03%) is water. The borough is bordered to the south by the 2,840-acre (11.5 km2) Youghiogheny River Lake and to the north by the 19,052-acre (77.10 km2) Ohiopyle State Park.
The climate in this area has mild differences between highs and lows, and there is adequate rainfall year-round. According to the Köppen Climate Classification system, Confluence has a marine west coast climate, abbreviated "Cfb" on climate maps.
As of the census of 2000, there were 834 people, 349 households, and 211 families residing in the borough. The population density was 522.4 people per square mile (201.3/km²).