West Middlesex is located at . According to the United States Census Bureau, the borough has a total area of. The Shenango River runs through West Middlesex, making it part of the Shenango Valley.
History
West Middlesex is one of the oldest localities in Mercer County. Samuel Byers, Andrew Wylie, William Bell, Richard Vanfleet and several others arrived in the vicinity in the late 18th century. In 1787, James Gibson received a plot of land west of the Shenango River for military services. Shortly thereafter, ownership of that land passed to Jacob Edeburn. In 1818, Jacob's son William Edeburn built a log grist mill on part of the land. It was purchased by James McConnell in 1821, who built a log house nearby. In 1830, Edeburn built a sawmill, and McConnell built a flour mill. James Gilkey, cultivator of the "Neshannock potatoes," surveyed the site and platted the town in 1836 on McConnell's land. A store and a tavern were opened about the time the town was platted, and in 1840 the post office was established, with Robert Young as the first postmaster. In 1864 West Middlesex was incorporated as a borough. The first burgess was D. Edeburn, and the first members of the council were C.W. Watson, Hiram Veach and G.R. Tuttle. West Middlesex was one of the first places in the Shenango Valley to become a center of the iron business. The old Middlesex furnace, erected in 1845, was a charcoal-burning plant. Additional coke and ore furnaces followed, including the Fannie and the Ella.
Demographics
As of the census of 2010, there were 863 people, 368 households, and 244 families residing in the borough. The racial makeup of the borough was 96.9% White, 1.2% African American, 0.3% Asian, 0.6% from other races, and 1.0% from two or more races. Hispanic or Latino of any race were 0.3% of the population. There were 391 housing units and 368 households, out of which 26.6% had children under the age of 18 living with them, 46.5% were married couples living together, 14.9% had a female householder with no husband present, and 33.7% were non-families. 30.2% of all households were made up of individuals, and 9.3% had someone living alone who was 65 years of age or older. The average household size was 2.35 people, and the average family size was 2.88 people. The age distribution was 20.2% under the age of 18, 9.2% from 18 to 24, 24.2% from 25 to 44, 30.9% from 45 to 64, and 15.5% who were 65 years of age or older. The median age was 43.3 years old. According to the 2015 American Community Survey, the median income for a household in the borough was $46,103, and the median income for a family was $53,750. Among full-time, year-round workers, males had a median income of $45,526 versus $33,675 for females. About 13.6% of families and 16.6% of the population had annual income below the poverty line.
Education
The West Middlesex Area School District serves the borough of West Middlesex and its two neighboring townships, Shenango Township and Lackawannock Township. The school district serves students in grades K-12, and it also offers Head Start preschool. Historically, West Middlesex has served students since shortly after the town was platted. A small frame house was built in 1837 for school sessions and church services, and in 1855, it was replaced by a two-story building: the first story for education, and the second story for worship. A three-story brick union schoolhouse was built in 1868.
