The Warren County Courthouse is in Belvidere, the county seat of Warren County, New Jersey.

[3] It is part of the 13th vicinage.

[4] It was built 1826 by L. H. Lewis[5] on land donated by Garret Dorset Wall.

[6] It was renovated in 1953 and expanded with an addition in 1961.

[7] It is a contributing property to the Belvidere Historic District, added to the National Register of Historic Places on October 3, 1980.