Churchville is a census-designated place (CDP) in Northampton Township, Bucks County, Pennsylvania, United States. The population was 4,128 at the 2010 census.
According to the United States Census Bureau, the CDP has a total area of 2.0 square miles (5.2 km2), of which 0.04 square miles (0.10 km2), or 0.98%, is water.
As of the 2010 census, Churchville was 95.3% White, 0.5% Black or African American, 2.1% Asian, and 0.8% were two or more races. 1.2% of the population was of Hispanic or Latino ancestry.
As of the census of 2000, there were 4,469 people, 1,370 households, and 1,257 families residing in the CDP. The population density was 2,215.2 people per square mile (854.2/km2). There were 1,375 housing units at an average density of 681.6/sq mi (262.8/km2). The racial makeup of the CDP was 97.99% White, 0.40% African American, 1.19% Asian, 0.04% from other races, and 0.38% from two or more races. Hispanic or Latino of any race were 0.51% of the population.
There were 1,370 households, out of which 42.8% had children under the age of 18 living with them, 85.9% were married couples living together, 4.3% had a female householder with no husband present, and 8.2% were non-families. 7.2% of all households were made up of individuals, and 3.1% had someone living alone who was 65 years of age or older. The average household size was 3.20 and the average family size was 3.35.