
Mifflinville
- County:
- Columbia County
- County Seat:
- No
- Area (mi²):
- 1.602
- State:
- Pennsylvania
Mifflinville is a CDP located in Columbia County, Pennsylvania. Mifflinville has a 2025 population of 1,192. Mifflinville is currently declining at a rate of -0.33% annually but its population has increased by 29.28% since the most recent census, which recorded a population of 922 in 2020.
The average household income in Mifflinville is $64,946 with a poverty rate of 10.58%. The median age in Mifflinville is 48.6 years: 39.7 years for males, and 56.7 years for females.