
Lansdowne
- County:
- Delaware County
- County Seat:
- No
- Area (mi²):
- 1.181
- State:
- Pennsylvania
Lansdowne is a borough located in Delaware County, Pennsylvania. Lansdowne has a 2025 population of 11,064. Lansdowne is currently declining at a rate of -0.05% annually and its population has decreased by -0.29% since the most recent census, which recorded a population of 11,096 in 2020.
The average household income in Lansdowne is $88,043 with a poverty rate of 10.61%. The median age in Lansdowne is 41.8 years: 41.4 years for males, and 44.3 years for females.