
Olivia
- County:
- Blair County
- County Seat:
- No
- Area (mi²):
- 0.233
- State:
- Pennsylvania
Olivia is a CDP located in Blair County, Pennsylvania. Olivia has a 2025 population of 54. Olivia is currently growing at a rate of 8% annually and its population has increased by 31.71% since the most recent census, which recorded a population of 41 in 2020.
The average household income in Olivia is $96,797 with a poverty rate of 1.97%. The median age in Olivia is 17.8 years: 39.5 years for males, and 14.5 years for females.