[1][2] The Old Passaic County Court House and Annex are located at 71 and 63-65 Hamilton Street, respectively.

It was designed by architect Samuel Burrage Reed and is an excellent example of Classical Revival architecture.

The Court House Annex was constructed in 1899 as the United States Post Office following a design of architect Fred Wesley Wentworth in the Dutch Baroque Revival style.

In October 2012, the buildings were determined to be eligible for the state and federal registers of historic places.

The New Jersey State historic preservation office made a grant of $20,000 to prepare nominations for listing.