Robert William "Bob" Packwood (born September 11, 1932) is an American politician from Oregon and a member of the Republican Party. He resigned from the United States Senate, under threat of expulsion, in 1995 after allegations of sexual harassment, abuse and assault of women emerged.

Packwood was born in Portland, Oregon, and is the great-grandson of William H. Packwood, the youngest member of the Oregon Constitutional Convention of 1857. He graduated from Willamette University in Salem in 1954 where he was a member of the Beta Theta Pi fraternity. Packwood graduated from the New York University School of Law in 1957. He was admitted to the bar in 1957 and practiced law in Portland. He was a member of the Oregon Legislative Assembly from 1963 to 1968. He founded the Dorchester Conference in the mid-'60s. Initially a forum for liberal politics, it has become an annual networking event for Oregon Republicans.

Packwood was elected to the Senate in 1968, defeating Wayne Morse. He was reelected in 1974, 1980, 1986 and 1992. Packwood chaired the powerful Senate Finance Committee from 1985 to 1987, when he was instrumental in passage of the Tax Reform Act of 1986, and again in 1995. He was chairman of the Senate Republican Conference, 1979-1980. His voting record was moderate. He introduced the Senate's first abortion legalization bill in 1970, and his pro-choice stance earned him the loyalty of many feminist groups, and the opposition of pro-life groups. He supported restrictions on gun owners and liberal civil rights legislation. In 1987 Packwood crossed party line to vote against the nomination of Robert Bork into the Supreme Court, and he was one of only two Republicans to vote against the nomination of Clarence Thomas into the court. In 1993 he was the only Senator to vote against mandatory life imprisonment for persons convicted of a third violent felony.