
Millbourne
- County:
- Delaware County
- County Seat:
- No
- Area (mi²):
- 0.074
- State:
- Pennsylvania
Millbourne is a borough located in Delaware County, Pennsylvania. Millbourne has a 2025 population of 1,194. Millbourne is currently declining at a rate of -0.33% annually and its population has decreased by -1.57% since the most recent census, which recorded a population of 1,213 in 2020.
The average household income in Millbourne is $87,594 with a poverty rate of 29.13%. The median age in Millbourne is 34.3 years: 33.8 years for males, and 39.2 years for females.