William Henry King (June 3, 1863 – November 27, 1949) was an American lawyer, politician, and jurist from Salt Lake City, Utah.

After holding local offices and serving two terms in the territorial legislature, he graduated from the law department of the University of Michigan at Ann Arbor.

When he ran for re-election in 1940, he lost the Democratic nomination to Congressman Abe Murdock, a "100% New Dealer" who strongly supported Roosevelt.

[5] One of his sons by Vera, David S. King, served three terms in the U.S. House of Representatives and was a United States Ambassador to both the Malagasy Republic and Mauritius.

King was a direct descendant of Edmund Rice, his family's English immigrant ancestor to Massachusetts Bay Colony, as follows:[6]