Plum is a city located in Pennsylvania. With a 2020 population of 26,947, it is the 20th largest city in Pennsylvania and the 1422nd largest city in the United States. Plum is currently declining at a rate of -0.35% annually and its population has decreased by -0.66% since the most recent census, which recorded a population of 27,126 in 2010. Plum reached it's highest population of 27,488 in 2014. Spanning over 29 miles, Plum has a population density of 943 people per square mile.
The average household income in Plum is $88,090 with a poverty rate of 4.34%. The median rental costs in recent years comes to $904 per month, and the median house value is $149,300. The median age in Plum is 45.9 years, 44.9 years for males, and 46.8 years for females. For every 100 females there are 92.7 males.