Alan S. Nakanishi, M.D., (b. March 21, 1940) is an American politician. He is the former mayor of the City of Lodi in San Joaquin County, having served four separate two-year terms. He was a Republican Assemblymember from California's 10th State Assembly district, serving from 2002 to 2008. In 2010, he was a candidate for the State Board of Equalization. Dr. Nakanishi advanced in the primary for California's 5th State Senate district to challenge incumbent Cathleen Galgiani in the 2016 General Election.