Montgomery County Flag

Montgomery County

State:
Pennsylvania
County Seat:
Norristown

Montgomery County's estimated 2025 population is 876,138 with a growth rate of 0.42% in the past year according to the most recent United States census data. Montgomery County is the 3rd largest county in Pennsylvania. The 2010 population was 800,881 and has seen a growth of 9.4% since that time.

876,138
Total Population
1,814
Population Density (mi²)
3
Population Rank (State)
3.7K 0.42%
Annual Population Growth

Montgomery County Population

Demographics

Economics and Income Statistics