Mercer is a city located in Mercer County Pennsylvania. It is also the county seat of Mercer County. With a 2020 population of 1,834, it is the 445th largest city in Pennsylvania and the 7949th largest city in the United States . Mercer is currently declining at a rate of -1.29% annually and its population has decreased by -8.39% since the most recent census, which recorded a population of 2,002 in 2010. Mercer reached it's highest population of 2,042 in 2010. Spanning over 1 miles, Mercer has a population density of 1,585 people per square mile.
The average household income in Mercer is $60,928 with a poverty rate of 14.18%. The median rental costs in recent years comes to $584 per month, and the median house value is $112,700. The median age in Mercer is 44.1 years, 41.4 years for males, and 46.6 years for females.