Monessen is a city located in Pennsylvania. With a 2020 population of 7,141, it is the 118th largest city in Pennsylvania and the 3903rd largest city in the United States. Monessen is currently declining at a rate of -0.94% annually and its population has decreased by -7.50% since the most recent census, which recorded a population of 7,720 in 2010. Monessen reached it's highest population of 20,268 in 1930. Spanning over 3 miles, Monessen has a population density of 2,473 people per square mile.
The average household income in Monessen is $54,028 with a poverty rate of 15.91%. The median rental costs in recent years comes to $611 per month, and the median house value is $77,000. The median age in Monessen is 46.7 years, 44.4 years for males, and 48.5 years for females. For every 100 females there are 87.4 males.