Chambersburg is a city located in Franklin County Pennsylvania. It is also the county seat of Franklin County. With a 2020 population of 21,461, it is the 24th largest city in Pennsylvania and the 1752nd largest city in the United States . Chambersburg is currently growing at a rate of 0.75% annually and its population has increased by 5.89% since the most recent census, which recorded a population of 20,268 in 2010. Chambersburg reached it's highest population of in . Spanning over 7 miles, Chambersburg has a population density of 3,099 people per square mile.
The average household income in Chambersburg is $63,480 with a poverty rate of 13.06%. The median rental costs in recent years comes to $820 per month, and the median house value is $154,700. The median age in Chambersburg is 37.6 years, 36.9 years for males, and 38.7 years for females.