The Scottish club, which has just won promotion to Division Two after claiming the Division Three title this season, has agreed the deal with Chivas Brothers.
The deal will see the continued use of the Ballantine's logo on Dumbarton's home and away kits.
Chivas chief executive Christian Porta said: "We are delighted to announce that Ballantine's will continue to be associated with Dumbarton's football team.
"With the brand's bottling plant based at Kilmalid, near Dumbarton, it is a fitting partnership which demonstrates our ongoing commitment to supporting the community."
Club chairman Gilbert Lawrie said: "Our ongoing partnership with Chivas Brothers through the Ballantine's brand is a tremendous boost for the club."