William Henry Corlett (1856 – October 7, 1937), also known as W. H. Corlett, and was an American architect and contractor, active in Napa County, California and the surrounding area. Several buildings and residences he designed are listed on the National Register of Historic Places.

Corlett was born in 1856 in Isle of Man; he immigrated to the United States in 1873, after the death of his mother. Corlett died at his home in Napa, California, on October 7, 1937, aged 81.

Work Works include (with attribution): Alexandria Hotel and Annex, 840-844 Brown St., Napa, California; (Corlett, William H.), NRHP-listed Downtown Oakland Historic District, roughly along Broadway from 17th to 11th St., Oakland, California; (Reed & Corlett), NRHP-listed Manasse Mansion (1886), 443 Brown St., Napa, California; (Corlett, W.H.), NRHP-listed Migliavacca House, Division St., Napa, California; NRHP-listed Napa Abajo-Fuller Park Historic District, roughly bounded by the Napa River, Pine, Jefferson, 3rd, 4th, and Division Sts., Napa, California; (Corlett, William H.), NRHP-listed Napa County Courthouse Plaza, bounded by Coombs, Second, Brown and Third Sts., Napa, California; (Corlett, William H.), NRHP-listed Noyes Mansion, 1750 First St., Napa, California; (Corlett, William H.), NRHP-listed St. Helena Carnegie Library, 1360 Oak Ave. St. Helena, California; (Corlett, William), NRHP-listed US Post Office-Napa Franklin Station, 1352 2nd St., Napa, California; (Corlett, William H.; Reed & Corlett), NRHP-listed Capt. N. H. Wulff House, 549 Brown St., Napa, California; (Corlett, William H.), NRHP-listed

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