David Sigurd Wallin (June 10, 1916 in Nora rural parish in Örebro County, Sweden – May 8, 1999 in Stockholm, Sweden) was a Swedish artist. He grew up in Stockholm. Sigurd Wallin was the son of the Swedish artist David Wallin (1876–1957) and his wife Elin Wallin (1884–1969; born in Lundberg, Stockholm). He was the brother of the artist Bianca Wallin (1909–2006). His uncle was the Swedish-American artist Carl E. Wallin (1879–1968). In 1945 he married Margit, born Ruuth; the couple settled down in Stockholm, Sweden, and had two daughters.