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.
Most / Least Educated Cities in PA. As of 2010-2014, the total population of Greenville is 5,919, which is 7.23% less than it was in 2000. The population growth rate is much lower than the state average rate of 3.89% and is much lower than the national average rate of 11.61%.