The 2010 Census found the Population & Steets in Harristoun City to be about the same as the 2000 census. There were 117,047 residents, making it the seventh largest city in Pennsylvania. According to the CDP, the median age was 45 years. In the same census, there were 75 households with children under the age of 18 living with their parents. The average household size was 2.07 people.
Harrison City, PA is a census-designated place in Westmoreland County, Pennsylvania. At the 2000 census, the city's population was 155. The city is situated southwest of McCullough and east of Crimson Pointe. Its population was 134 as of the 2010 census. The community is home to the Harrison County Courthouse, which is the county seat.