Wesley Whitehouse was the defending champion, but turned 18 years old during the season and, therefore, was ineligible to compete in Juniors. Roger Federer defeated Irakli Labadze in the final, 6–4, 6–4 to win the boys' singles tennis title at the 1998 Wimbledon Championships. It was Federer's 4th juniors singles title. He would go on to win a record eight senior titles between 2003 and 2017, including five in a row between 2003–07.