The U.S. Customhouse and Post Office is a historic commercial building at 1 Front Street in downtown Bath, Maine.

It is a two-story masonry structure, built out of ashlar granite and covered by a truncated metal hip roof.

Its front facade (facing west) has a center projecting section topped by a fully pedimented low-pitch gable.

[2] The customhouse was built in 1858 to serve the needs of Bath's burgeoning port, which was a major shipping and shipbuilding center on Maine's Mid Coast.

Young was responsible for the design of many government buildings, including notable works such as the Vermont State Capitol and the Boston Custom House.