Cathedral of Saint Mary of the Assumption, Roman Catholic cathedral in Cathedral Hill, San Francisco, United States.

The Cathedral of Saint Mary of the Assumption on Cathedral Hill is a 58 m high concrete building whose saddle roof is made of eight hyperbolic paraboloid segments: square at the bottom, cross-shaped at the top, crowned by a 17 m golden cross. The roof is clad in travertine. Inside, three groups of pews face the slightly raised altar from the front, left and right, seating 2,500 people. The entrance is filled with dark bronze relief panels.

The first Saint Mary's Cathedral was consecrated in 1854, built with brick shipped around Cape Horn and granite cut in China. The second, dedicated in 1891 at Van Ness and O'Farrell, burned down on 7 September 1962. The cornerstone of the present cathedral was laid on 13 December 1967; the building was finished in 1970 and consecrated on 5 May 1971, costing $9 million.

The cathedral functions as the mother church of the Roman Catholic Archdiocese of San Francisco, drawing worshippers for regular services and religious celebrations. It serves as a spiritual center where the local Catholic community gathers throughout the year.

The building is located on Gough Street in the Cathedral Hill neighborhood and is accessible by public transit. Daily services are held, and live streaming options allow participation from home.

The roof's eight hyperbolic paraboloid segments make the horizontal cross-section a square at the bottom and a cross at the top. Critics who disliked the modernist design nicknamed the cathedral "Our Lady of Maytag" because the roof resembled a washing machine agitator. A 2.7-ton brass bell over 122 years old, saved from the 1962 fire, stood outside until it was stolen in 2011 and never recovered.