Garrett Hill is an unincorporated community in Radnor Township, Pennsylvania, United States, located approximately eight miles northwest of Philadelphia.

[1] One of Garrett Hill's traditions is an annual community Fourth of July parade, followed by a free picnic with live music and other entertainment in Clem Macrone Park.

Garrett Hill's housing stock consists largely of late 19th-century and early-to-mid 20th-century structures, including Victorian, single-family frame and brick duplex homes.

The 253 acres that make up the heart of present-day Garrett Hill were originally settled by the family of David James and Margaret Mortimer of Llandegley and Glascwm Parises of Radnorshire, Wales who arrived in Pennsylvania on October 28, 1682 on board the sailing ship Bristol Factor that was captained by Roger Drew.

When the James family arrived in the fall of 1682, they proceeded to present day Garrett Hill using dead reckoning, for the area at that time was still wilderness.

David James had acquired "rights" to 100 acres where Garrett Hill stands today when he purchased an "indenture" to land in Welshpoole, Wales in the summer of 1682.