Pleasant Hill is a census-designated place (CDP) in Lebanon County, Pennsylvania, United States. The population was 2,301 at the 2000 census.GeographyPleasant Hill is located at .According to the United States Census Bureau, the CDP has a total area of 0.7sqmi, all of it land.DemographicsAs of the 2010 United States Census, there were 2,643 people residing in the CDP. The racial makeup of the CDP was 68.8% White, 5.0% Black, 0.3% Native American, 2.9% Asian, 0.2% from some other race and 1.3% from two or more races. 21.6% were Hispanic or Latino of any race.