Population Demographics
As of 2026 the population of Montour County is 18,035. The population is expected to shrink to 17,995 by 2031 - a growth rate of -0.04%.
The median age of Montour County residents is 44.
The diversity index of Montour County is 26.1, meaning that there is a 26% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.