The name "Langhorne" is also used broadly to include the surrounding townships encompassed by ZIP code 19047. Sesame Place, while physically located in surrounding Middletown Township, has Langhorne as its mailing address.
Langhorne Borough is about 6 miles west of the Delaware River.
Langhorne Manor is a separate borough that borders Langhorne proper to the south.
As of the census of 2000, there were 1,981 people, 552 households, and 338 families residing in the borough. The population density was 4,016.3 people per square mile (1,561.0/km²). There were 649 housing units at an average density of 1,315.8/sq mi (511.4/km²). The racial makeup of the borough was 81.52% White, 15.19% African American, 0.15% Native American, 1.46% Asian, 0.76% from other races, and 0.91% from two or more races. Hispanic or Latino of any race were 2.62% of the population.
There were 552 households out of which 25.9% had children under the age of 18 living with them, 47.5% were married couples living together, 9.8% had a female householder with no husband present, and 38.6% were non-families. 31.7% of all households were made up of individuals and 8.7% had someone living alone who was 65 years of age or older. The average household size was 2.40 and the average family size was 3.07.
In the borough the population was spread out with 26.2% under the age of 18, 10.4% from 18 to 24, 30.8% from 25 to 44, 21.8% from 45 to 64, and 10.8% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 117.5 males. For every 100 females age 18 and over, there were 107.1 males.
The median income for a household in the borough was $56,389, and the median income for a family was $75,429. Males had a median income of $48,125 versus $31,759 for females. The per capita income for the borough was $21,479. About 2.6% of families and 3.0% of the population were below the poverty line, including 3.0% of those under age 18 and 4.7% of those age 65 or over.