Quentin is an unincorporated community and census-designated place (CDP) in Lebanon County, Pennsylvania, United States.

In October 1920, the name was changed to honor Quentin Roosevelt,[4] who was killed while flying as a fighter pilot during World War I.

[5] Quentin is located in southern Lebanon County, in the northeast corner of West Cornwall Township.

Pennsylvania Route 419 passes through the center of Quentin, leading east 8 miles (13 km) to Schaefferstown.

According to the United States Census Bureau, the CDP has a total area of 0.64 square miles (1.65 km2), all land.