Alexis Irénée du Pont Bayard (February 11, 1918 – September 3, 1985) was an American lawyer and politician from Rockland, near Greenville, in New Castle County, Delaware.

A member of the Democratic Party, he served as the 13th Lieutenant Governor of Delaware from 1949 to 1953 and ran unsuccessfully for the United States Senate in 1952.

By this time the du Ponts were a large and enormously wealthy family, many of whom were involved in the political life of Delaware.

[1] A war era veteran with a well-known name, the 30-year-old Bayard was elected lieutenant governor in 1948,[1][2] defeating Republican Chester V. Townsend Jr. of Dagsboro, who was speaker of the Delaware House of Representatives.

These factors, along with Williams' reputation for honesty, integrity, fairness, and bipartisanship in the U.S. Senate and the popularity of the Republicans' U.S. presidential candidate, Dwight D. Eisenhower, led the incumbent to a ten-point victory over Bayard at the polls.

After his defeat by Williams, Bayard resumed his law practice in Wilmington and remained an active supporter of the Democratic Party.

[citation needed] They had six children: Alexis I., Eugene H., Richard H., John F., William B. and Jane H.[1] He was known as "Lex" in his law practice.