Crime Scene & Biohazard Cleanup Near Strawpump Irwin, PA

Irwin is a borough in Westmoreland County, Pennsylvania, located about 22 miles southeast of Pittsburgh.

Irwin was settled in September 1853 and incorporated as a borough on November 14, 1864.

Irwin was named for John Irwin, the original owner of the town site.

Irwin was the original western terminus of the Pennsylvania Turnpike when America's first turnpike opened in October 1940, and the borough is still served by the Turnpike's Irwin interchange, Exit 67.

Some of the most extensive bituminous coal deposits in Pennsylvania are located in Irwin, and the borough was once home to iron foundries, flour mills, car shops, and electrical goods and mirror factories.

Irwin had a population of 3,902 at the 2020 census, down from a peak of 4,995 residents in 1980.

There were 2,009 households in Irwin at the 2020 census, and about 44% of them were made up of people living alone.

Irwin covers only about 0.84 square miles, giving it a population density of roughly 4,660 people per square mile.

Brush Hill, a historic home in Irwin, was listed on the National Register of Historic Places in 1975.

Irwin is served by the Norwin School District, and its students attend Norwin High School alongside students from North Irwin and North Huntingdon Township.