5, also known as Eight Square Schoolhouse, is a historic octagonal school building located in Dryden in Tompkins County, New York.

It was built in 1827 and is a simple one-room, one-story, brick octagon style building constructed with a low pitch hipped roof banded by a plain narrow frieze.

A circular brick chimney rises from the center of the standing seam metal roof.

Also on the property are two free standing, wood frame, gable roofed outhouses.

This article about a historic property or district in Tompkins County, New York, that is listed on the National Register of Historic Places, is a stub.