On the List of United States federal courthouses in the First Circuit in New Hampshire, U.S Custom House & Post Office in Portsmouth was the first one to be used as a courthouse.
U.S. Custom House & Post Office Portsmouth 18601926
Now privately owned. U.S. Post Office & Court House 19351982
Still in use as a post office. Warren B. Rudman U.S. Courthouse 1968present U.S. Post Office & Court House 18891967
Now the state's Legislative Office Building. 
