For this election, California was divided into 10 election districts; no counties had been established yet, although each district covers an area that includes each one's modern county. The District of San Jose covered generally what is now Alameda, Contra Costa, and Santa Clara counties. The Journal of the Senate lists the totals as 7,374 for McDougal, 2,368 for Roman, 1,558 for Frisbie, 1,060 for Lippitt, 802 for "Alwin", 157 for Burnett, and 129 for de la Guerra.
John McDougal became governor on January 9, 1851 when Peter Burnett resigned. David Broderick, the President of the Senate, served as Acting Lieutenant Governor for the remainder of the term.
Source for Popular Vote data: California State Archives, "Lt. Governor," Aggregate of Votes for Governor, Lt. Governor and Members of Congress (Monterey, 1849)