Gladwyne Historic District

Gladwyne Historic District is a national historic district located at Gladwyne in Lower Merion Township, Montgomery County, Pennsylvania. It encompasses 57 contributing buildings in the historic core of Gladwyne known as "Merion Square." It includes mainly mill or farm workers' dwelling. They are predominantly 2 1/2-story, two bay stuccoed stone structures dated to the early- to mid-19th century. Notable buildings include the Guard House Inn, "War Office" (1798), and Gladwyne Library.

It was added to the National Register of Historic Places in 1980.