William John Bowser (Rexton, New Brunswick December 3, 1867[1] – October 25, 1933 Vancouver) was a politician in British Columbia, Canada.

Bowser served as Attorney General in the cabinet of Sir Richard McBride from 1907 until 1915.

The Conservative party was deeply divided and unpopular[2] and the change in leadership did not improve matters.

The Conservatives also neglected to address popular demands for women's suffrage and prohibition.

Bowser's government was defeated in the 1916 election, losing to Liberal leader Harlan Carey Brewster, who two years later was succeeded by the more memorable John Oliver.