The Rockingham Hotel is a historic former hotel and contemporary condominium in Portsmouth, New Hampshire, United States. A previous structure on the site was built in 1785 as a residence by Woodbury Langdon, prominent merchant and politician. Thomas Coburn converted it into a hotel which opened November 1, 1833. Portsmouth mayor, congressman, and prominent local brewer Frank Jones bought it in 1870. After a fire in 1884, Jones rebuilt it extensively, retaining Langdon's dining room, today's Library Restaurant.