Jackson County, organized as one of the original 33 counties by the Territorial Legislature, was organized on September 24, 1855.The county was founded by George Coleman; Stephen J. Elliot; John Dutt; Simon McCrory; Simeon Fees; Godfrey Hafer; James H. Baxter; S. W. McComas; Peter Bryant; Preston H. Humphrey; John James; J. H. Bateman; A. Ash; John ...
Population. 1  The population of Greenville is 26,723. 2  67.9% of the total population of Greenville is White, 16.2% is Black or African American, and 1.4% is Asian. 3  The age distribution of Greenville is 56.1% ages 20-64 years, 27.7% ages 19 years or younger and 16.2% ages 65 years or older. 4  The median age for females is 36.6 years old.
The 2016 Greenville, Pennsylvania, population is 650. There are 26 people per square mile (population density). The median age is 33. The US median is 37.4. 55.08% of people in Greenville, Pennsylvania, are married. 5.68% are divorced. The average household size is 2.94 people. 41.95% of people are married, with children. 9.20% have children, but are single.