High Quality Content by WIKIPEDIA articles! Gavin Christopher Newsom (born October 10, 1967) is an American politician who is the 49th and current Lieutenant Governor of California. Previously, he was the 42nd Mayor of San Francisco, and was elected in 2003 to succeed Willie Brown, becoming San Francisco`s youngest mayor in 100 years. Newsom was re-elected in 2007 with 72 percent of the vote. In 2010, Samepoint released a study that measured the social media influence of mayors around the country, and ranking the top 100 most social mayors. San Francisco`s Mayor Gavin Newsom was named the Most Social Mayor in America according to the Samepoint study.