Elizabethtown is a borough in Lancaster County, Pennsylvania, United States. It is located 18 miles (29 km) southeast of Harrisburg, the state capital. Small factories existed at the turn of the 20th century when the population in 1900 was 1,861. As of the 2020 census, the population of the borough was 11,639. Elizabethtown is commonly referred to in south-central Pennsylvania as E-Town. This nickname is also used for the local college and high school.