Thomas J. Campbell (b. August 14, 1952) is the dean (since 2002) of the Haas School of Business at the University of California, Berkeley and an American politician of the Republican Party.
Born in Chicago, Campbell obtained his B.A. and M.A. degrees from the University of Chicago (1973) and a J.D. from Harvard Law School (1976). He returned to the University of Chicago to earn a Ph.D. in economics in 1980.
Campbell was admitted to the bar in 1976 and commenced practice in Chicago. He was a White House fellow in the office of the chief of staff and White House counsel (1980-1981). He then served as director of the Bureau of Competition, Federal Trade Commission (1981-1983).
Campbell was a professor at Stanford Law School from 1983 until 2002 (though he was "on leave" from 1988 to 2002). Representing the 15th District of California, he elected to the United States House of Representatives five times. Elected to the 101st and 102nd Congresses (January 3, 1989-January 3, 1993), he was not a candidate for renomination in 1992 to the 103rd Congress but was an unsuccessful candidate for nomination for the United States Senate. He then served in the California State Senate from 1993 to 1995. He was elected to the 104th Congress on December 12, 1995, to fill the vacancy caused by the resignation of Norman Mineta and reelected to the 105th and 106th Congresses (December 12, 1995, to January 3, 2001); was not a candidate in 2000 for reelection, but was an unsuccessful candidate for election to the United States Senate against Dianne Feinstein. Among his legislative accomplishments were authorship of the 1998 Food Bank Relief Act and the 2000 Peace Corps Reauthorization Act. He was succeeded in the House by Mike Honda.