Jefferson County Courthouse Complex is a courthouse complex and national historic district located at Watertown in Jefferson County, New York.

The courthouse building is a two-story, red brick structure with limestone trim.

It features a three-story tower on the northwest corner.

[2] It was listed on the National Register of Historic Places in 1974.

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