2019 Wimbledon Championships – Boys' singles

Tseng Chun-hsin was the defending champion, but participated at the men's singles qualifying as a wild card, who lost to Tommy Paul in the first round.

Shintaro Mochizuki won the title, defeating Carlos Gimeno Valero in the final, 6–3, 6–2. Future men's Wimbledon champion Carlos Alcaraz participated in this event, losing in the final eight.

Seeds
• Holger Vitus Nødskov Rune (third round)

• 🇨🇿 Jonáš Forejtek (first round)

• 🇦🇷 Thiago Agustín Tirante (first round)

• 🇺🇸 Martin Damm (semifinals)

• 🇨🇿 Jiří Lehečka (second round)

• 🇺🇸 Brandon Nakashima (third round)

• 🇺🇸 Toby Kodat (first round)

• 🇯🇵 Shintaro Mochizuki (champion)

• 🇨🇳 Bu Yunchaokete (withdrew)

• 🇪🇸 Carlos Alcaraz (quarterfinals)

• 🇫🇮 Otto Virtanen (first round)

• 🇨🇦 Liam Draxl (second round)

• 🇷🇴 Filip Cristian Jianu (third round)

• 🇯🇵 Shunsuke Mitsui (second round)

• 🇧🇪 Gauthier Onclin (first round)

• 🇯🇵 Keisuke Saitoh (first round)

• 🇫🇷 Harold Mayot (semifinals)

Seeds
• # 🇵🇱 Wojciech Marek (moved to main draw)

• # 🇨🇿 Dalibor Svrčina (moved to main draw)

• # Stijn Pel (first round)

• # 🇧🇾 Alexander Zgirovsky (first round)

• # Nguyễn Văn Phương (qualified)

• # 🇨🇿 Andrew Paulson (qualifying competition)

• # 🇺🇸 Dali Blanch (qualifying competition)

• # 🇧🇷 Natan Rodrigues (qualified)

• # 🇦🇷 Román Andrés Burruchaga (qualified)

• # 🇨🇮 Eliakim Coulibaly (qualifying competition)

• # 🇺🇸 William Grant (qualifying competition; lucky loser)

• # 🇫🇷 Baptiste Anselmo (qualified)

• # 🇹🇭 Thantub Suksumrarn (first round)

• # 🇷🇺 Egor Agafonov (first round)

• # 🇫🇷 Loris Pourroy (qualifying competition)

• # 🇺🇸 Andres Martin (qualified)

Qualifiers
• # 🇯🇵 Ryoma Matsushita

• # 🇺🇸 Andrew Dale

• # 🇫🇷 Baptiste Anselmo

• # 🇬🇧 Derrick Chen

• # Nguyễn Văn Phương

• # 🇺🇸 Andres Martin

• # 🇦🇷 Román Andrés Burruchaga

• # 🇧🇷 Natan Rodrigues

Lucky loser
• # 🇺🇸 William Grant