William V. Roth Jr., American lawyer and politician (d. 2003)
William Victor Roth Jr. (July 22, 1921 – December 13, 2003) was an American lawyer and politician from Wilmington, Delaware. He was a veteran of World War II and a member of the Republican Party. He served from 1967 to 1970 as the lone U.S. Representative from Delaware and from 1971 to 2001 as a U.S. Senator from Delaware. He is the most recent Republican to have served as a U.S. Senator from Delaware.

Roth was a sponsor of legislation creating the Roth IRA, an individual retirement plan that can be set up with post-tax dollars, offering tax-free withdrawals.