William Bertrand Stevens (November 19, 1884 - August 22, 1947) was second bishop of the Episcopal Diocese of Los Angeles, serving from 1928 to 1947.

He was a member of Phi Beta Kappa, Sons of the American Revolution, the Society of Colonial Wars, the Society of the Descendants of the Colonial Clergy, Phi Gamma Delta, Pi Epsilon Theta, Theta Phi, Phi Mu Alpha, the University Club in Pasadena, the Los Angeles Athletic Club, the Jonathan Club, Knights Templar, Red Cross of Constantine, Masons, and Sons of the Revolution.

He was a Major Chaplain in the US Army Reserve, he was a field director for the American Red Cross, and a captain in the California Naval Militia.

They had 4 daughters Ellen(Prince), Ann(McNair), Edith(Haney), and Emily(Hall).

Stevens died in office of complications following surgery at the Good Samaritan Hospital in Los Angeles.