Louis Reginald Williams (1890–1980) was an ecclesiastical architect in Australia. He designed churches throughout the country, particularly in Victoria, primarily Anglican but also Methodists, Presbyterians, Lutherans and Christian Scientists. He himself regarded St Andrew's Anglican Church, Brighton in Melbourne, as his greatest work.
Williams was probably the major church architect in Australia in the Arts and Crafts tradition from the 1920s to the 1970s.[1]