John Edward Sununu (born September 10, 1964) is a United States Senator from New Hampshire.

John E. Sununu studied at the Massachusetts Institute of Technology and Harvard University. After graduating, he worked in the high-tech industry, at one time for the company of Dean Kamen.

He is the son of former New Hampshire governor John H. Sununu.

First elected to the U.S. House of Representatives in 1996, he won the New Hampshire senate seat in 2002.