William Sargent Ladd (October 10, 1826 – January 6, 1893) was an
American politician and businessman in
Oregon. He twice served as
Portland, Oregon’s mayor in the 1850s. A native of
Vermont, he was a prominent figure in the early development of Portland, and co-founded the first bank in the state in 1859. Ladd also built the first brick building in Portland and was a noted philanthropist. Part of his former estate, the
Ladd Carriage House, is on the
National Register of Historic Places.