Sharon was settled in 1795, incorporated as a borough on October 6, 1841, and incorporated as a city on December 17, 1918. The city operated under the PA third-class city charter until 2008; currently, it is transitioning to a home-rule charter which will take effect in 2010, replacing its elected mayoral post with an appointed city manager and financial officer.
As of the census of 2000, there were 16,328 people, 6,791 households, and 4,189 families residing in the city. The population density was 4,342.6 people per square mile (1,676.7/km²). There were 7,388 housing units at an average density of 1,964.9/sq mi (758.6/km²). The racial makeup of the city was 86.44% White, 10.85% African American, 0.18% Native American, 0.21% Asian, 0.02% Pacific Islander, 0.23% from other races, and 2.08% from two or more races. Hispanic or Latino of any race were 0.88% of the population.
From the Census Ancestry Question, Sharon has the following ethnic make-up: German 21%, Irish 14%, Italian 11%, Black or African American 11%, English 8%, Polish 5%, Slovak 5%, Welsh - 3%, Scotch-Irish 2%, Hungarian 2%, Dutch 2%, French (except Basque) 2%, Croatian 1%, Scottish 1%, Russian 1%, Swedish 1%, Arab 1%, Slavic 1%, American Indian tribes, specified 1%.
There were 6,791 households out of which 28.1% had children under the age of 18 living with them, 40.7% were married couples living together, 16.6% had a female householder with no husband present, and 38.3% were non-families. 33.7% of all households were made up of individuals and 15.5% had someone living alone who was 65 years of age or older. The average household size was 2.33 and the average family size was 2.97.
In the city the population was distributed with 24.4% under the age of 18, 8.0% from 18 to 24, 27.2% from 25 to 44, 22.0% from 45 to 64, and 18.5% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 88.3 males. For every 100 females age 18 and over, there were 83.7 males.
The median income for a household in the city was $26,945, and the median income for a family was $34,581. Males had a median income of $30,072 versus $20,988 for females. The per capita income for the city was $15,913. About 14.0% of families and 17.6% of the population were below the poverty line, including 25.8% of those under age 18 and 8.8% of those age 65 or over.
In 1900, the population was 8,916 persons; in 1910, 15,270 persons; in 1920, 21,747 persons; and 25,622 people lived in Sharon in 1940. The population was 16,328 at the 2000 census.Sharon, along with Mercer County, is counted by the US Census Bureau as part of the Youngstown-Warren, OH Metropolitan Area.