2019 Columbus Challenger II – Singles

J. J. Wolf was the defending champion but lost in the second round to Nam Ji-sung.

Mikael Torpegaard won the title after defeating Nam 6–1, 7–5 in the final.

Seeds
All seeds receive a bye into the second round. • # 🇺🇸 Michael Mmoh (second round, retired)

• # 🇯🇵 Yasutaka Uchiyama (quarterfinals)

• # 🇪🇨 Emilio Gómez (quarterfinals)

• # 🇺🇸 Donald Young (second round)

• # Darian King (withdrew)

• # 🇮🇱 Dudi Sela (semifinals, retired)

• # 🇪🇨 Roberto Quiroz (second round)

• # Mikael Torpegaard (champion)

• # 🇺🇸 Tim Smyczek (third round)

• # 🇨🇳 Li Zhe (second round)

• # 🇰🇷 Lee Duck-hee (third round)

• # 🇺🇸 Thai-Son Kwiatkowski (semifinals)

• # 🇨🇦 Filip Peliwo (second round)

• # 🇺🇸 J. J. Wolf (second round)

• # 🇺🇸 Collin Altamirano (third round)

• # 🇧🇷 João Menezes (quarterfinals)