Dennis Gilbert (born October 30, 1996) is an American professional ice hockey defenseman who is currently playing with the Buffalo Sabres of the National Hockey League (NHL).
He was selected by the Chicago Blackhawks, 90th overall, in the 2015 NHL Entry Draft.
In his sophomore season with the Fighting Irish in 2016–17, Gilbert helped guide Notre Dame to the Frozen Four and was announced as the Hockey East's Best Defensive Defenseman and a Hockey East Third Team All-Star.
Gilbert concluded his collegiate career following his junior season with the Fighting Irish in the 2017–18 season, turning professional by signing a three-year, entry-level contract with the Chicago Blackhawks on April 14, 2018.
On July 2, 2024 he signed a one-year, $825,000 contract with Buffalo.