Jefferson County Courthouse Complex
| Jefferson County Courthouse Complex | |
| Old Jefferson County Courthouse, October 1966 | |
| Interactive map showing the location for Jefferson County Courthouse Complex | |
| Location | SE corner of Arsenal and Sherman Sts., Watertown, New York | 
|---|---|
| Coordinates | 43°58′31″N 75°54′51″W / 43.97528°N 75.91417°W | 
| Area | 2 acres (0.81 ha) | 
| Built | 1862 | 
| Architect | White, Horatio Nelson; Kieff & Hose | 
| NRHP reference No. | 74001248 | 
| Added to NRHP | June 07, 1974 | 
Jefferson County Courthouse Complex is a courthouse complex and national historic district located at Watertown in Jefferson County, New York. The district includes three contributing buildings; the courthouse building (1862), Clerk's Office (1883–1884) and Surrogate's Office (1905). The courthouse building is a two-story, red brick structure with limestone trim. It features a three-story tower on the northwest corner. It was designed by architect Horatio Nelson White.
It was listed on the National Register of Historic Places in 1974.