The City of Santa Barbara Historic Landmarks consist of buildings and sites designated by the City of Santa Barbara, California, as historic landmarks. The city also maintains a list of Structures of Merit, a Historic Resources Inventory, and a list of designated and potential Historic Districts.

Peter Josiah Barber was an American carpenter, architect, and prominent citizen of Santa Barbara, California. A native of Ohio, he was drawn to California during the Gold Rush in 1852 and settled in Santa Barbara in 1869, where he established himself as the city's foremost architect and served as postmaster and for two terms as mayor. His works include the Arlington Hotel, the second County Courthouse, and the original Santa Barbara Cottage Hospital, as well as several private houses. As mayor, he was also responsible for public works projects, most prominently the tree-lined boulevard, now called Cabrillo Boulevard, at East Beach. Three of the buildings he designed are listed on the National Register of Historic Places.