2018 Wimbledon Championships – Girls' singles

Future World No.1 Iga Świątek defeated Leonie Küng in the final, 6–4, 6–2. It was Świątek's first title on grass.

Claire Liu was the defending champion, but chose not to compete in the junior event. She received a wildcard into the qualifying competition and won three matches to qualify for the main draw before losing to eventual champion Angelique Kerber in the second round; she was the only player in the tournament to win a set against Kerber.

This tournament featured a second round match between Emma Raducanu and Leylah Fernandez; the pair would later face off in the women's final of the 2021 US Open. Raducanu won this encounter before losing to Świątek in the quarterfinals.