William Bertrand Stevens (19 November 1884 - 22 August 1947) was second bishop of the Episcopal Diocese of Los Angeles, serving from 1928 to 1947. He had previously served as coadjutor bishop from 1920 to 1928. He was a member of Phi Beta Kappa, Sons of the American Revolution, the Society of Colonial Wars, the , 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.