William Wallen may refer to: * William Wallén (born 1991), Swedish ice hockey forward * William Wallen Sr. (1790–1873), English architect and surveyor in London * William Wallen Jr. (1817–1891), English architect and surveyor in London * William Wallen (architect, born 1807) (1807–1888), English architect who practiced in London and Huddersfield, Yorkshire

See also