Colwyn is a borough in Delaware County, Pennsylvania, United States. As of the 2020 census, Colwyn had a population of 2,474.
Colwyn is located along the eastern border of Delaware County at (39.913062, -75.253409), where Darby Creek and Cobbs Creek intersect. It is bordered to the north by the borough of Darby, to the west by Sharon Hill, to the south by Darby Township, and to the east by Philadelphia.
According to the U.S. Census Bureau, the borough has a total area of , all land.
As of 2008, there were of public roads in Colwyn, all of which were maintained by the borough.
No numbered highways serve Colwyn directly. Fourth Street is the longest street within borough limits.
The Darby station on the SEPTA Wilmington/Newark Line is on Pine Street in Darby, just west of the Colwyn border.
As of 2010 census, the racial makeup of the borough was 15.9% White, 80.1% African American, 0.7% Asian, 0.6% from other races, and 2.6% from two or more races. Hispanic or Latino of any race were 1.6% of the population. 25.7% of the borough's population was foreign-born, mostly African-born.
The borough government is in financial difficulty. In May 2015, it was declared to be "financially distressed" by the state. With an annual budget of about two million dollars, the borough is more than one million dollars in debt.
The local district attorney has seized financial records, although at least some from 2011, 2012, and 2013 cannot be accounted for.
The local tax rate is very high; press reports indicate it to be five times higher than in richer regional towns. No new buildings have been built in Colwyn since 2007.
William Penn School District serves Colwyn. The district was created in 1972; prior to that year, Colwyn was in the Darby-Colwyn School District.