
Porter County
- State:
- Indiana
- County Seat:
- Valparaiso
Porter County's estimated 2025 population is 176,309 with a growth rate of 0.28% in the past year according to the most recent United States census data. Porter County is the 10th largest county in Indiana. The 2010 population was 164,492 and has seen a growth of 7.18% since that time.