Biohazard and Pathogen Disinfection in Rosemont, PA

Rosemont is a neighborhood and census-designated place that straddles two counties: it lies partly in Lower Merion Township in Montgomery County and partly in Radnor Township in Delaware County.

Rosemont sits on the Philadelphia Main Line, about 11 miles west of Philadelphia, along Lancaster Avenue.

Rosemont's population was 3,507 at the 2020 census, rebounding from 3,135 in 2010 and up from 2,816 in 1990.

Rosemont is compact, covering only about 0.82 square miles at a density of roughly 4,270 people per square mile.

Rosemont has about 1,460 housing units, roughly 95% of them occupied, split almost evenly between owner-occupied and renter-occupied homes.

Rosemont is best known as the home of Rosemont College, a private Catholic institution founded in 1921 by the Sisters of the Holy Child Jesus as a women's college; its undergraduate college admitted men for the first time in fall 2009.

Rosemont College began in Rathalla, the mansion of Philadelphia distiller and banker Joseph F. Sinnott, which the sisters purchased as the college's first home; the Joseph Sinnott Mansion was listed on the National Register of Historic Places in 1980.

In 2025, Rosemont College announced plans to merge into nearby Villanova University, with its 58-acre campus becoming a Villanova campus.

Rosemont's Church of the Good Shepherd, built in 1894 on Lancaster Avenue, is a notable example of Gothic Revival Anglo-Catholic church architecture.