The 2019 OEC Kaohsiung-Singles was a men's tennis tournament held from September 16 to September 22, 2019, at Kaohsiung, Taiwan. Gaël Monfils was the defending champion but chose not to defend his title.
John Millman won the title after defeating Marc Polmans 6–4, 6–2 in the final.
Seeds All seeds receive a bye into the second round.
Draw
Finals
Top half
Section 1
Section 2
Bottom half
Section 3
Section 4
References
Main draw Qualifying draw