Greenville is a city located in Mercer County Pennsylvania. With a 2020 population of 5,168, it is the 181st largest city in Pennsylvania and the 4677th largest city in the United States . Greenville is currently declining at a rate of -1.00% annually and its population has decreased by -12.69% since the most recent census, which recorded a population of 5,919 in 2010. Greenville reached it's highest population of in . Spanning over 2 miles, Greenville has a population density of 2,739 people per square mile.
The average household income in Greenville is $58,182 with a poverty rate of 17.82%. The median rental costs in recent years comes to $605 per month, and the median house value is $73,700. The median age in Greenville is 28.7 years, 28.9 years for males, and 28.2 years for females.