2003 NCAA Division I Men's Tennis Championships

The 2003 NCAA Division I Men's Tennis Championships were the 57th annual tournaments to determine the national champions of NCAA Division I men's singles, doubles, and team collegiate tennis in the United States.

Illinois defeated Vanderbilt in the championship final, 4–3, to claim their first national title. This aided the Illini in winning the team, singles, and doubles NCAA tennis titles during the season.

Host sites
This year's tournaments were played at the Dan Magill Tennis Complex at the University of Georgia in Athens, Georgia.

The men's and women's tournaments would not be held at the same site until 2006.