Summerfield is an unincorporated community in northwestern Castro County, Texas, United States.

[2] Although Summerfield is unincorporated, it has a post office, with the ZIP code of 79085.

[3] Summerfield was founded as Boom in the late 1890s; it was renamed for surveyor John Summerfield in 1907 because there was another Texas community named Boom.

The community was built along the Pecos & Northern Texas Railway, near Castro Creek and the Deaf Smith and Parmer county lines.

This article about a location in Castro County, Texas is a stub.