| 2019 Gwangju Open | |
|---|---|
| Date | 13–19 May |
| Edition | 4th |
| Surface | Hard |
| Location | Gwangju, South Korea |
| Champions | |
| Singles | |
 Jason Jung | |
| Doubles | |
Hsieh Cheng-peng /  Christopher Rungkat | |
The 2019 Gwangju Open was a professional tennis tournament played on hard courts. It was the 4th edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Gwangju, South Korea between 13 and 19 May 2019.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 LTU | |||
 UKR | Sergiy Stakhovsky | 114 | 2 |
 CAN | Brayden Schnur | 117 | 3 |
 RUS | Evgeny Donskoy | 128 | 4 |
| TPE | Jason Jung | 129 | 5 |
 KOR | Kwon Soon-woo | 135 | 6 |
 SVK | Lukáš Lacko | 151 | 7 |
 JPN | Tatsuma Ito | 160 | 8 |
 BEL | Ruben Bemelmans | 163 | 9 |
| JPN | Yūichi Sugita | 181 | 10 |
 AUS | Max Purcell | 236 | 11 |
 ISR | Dudi Sela | 239 | 12 |
 CHN | Li Zhe | 243 | 13 |
| JPN | Kaichi Uchida | 245 | 14 |
| KOR | Lee Duck-hee | 247 | 15 |
 IND | Saketh Myneni | 248 | 16 |
The following players received wildcards into the singles main draw:
Hong Seong-chan Lee Jea-moon Na Jung-woong Nam Ji-sung Son Ji-hoonThe following players received entry into the singles main draw using their ITF World Tennis Ranking:
Bai Yan Shintaro Imai Kim Cheong-eui Konstantin Kravchuk Rio Noguchi The following players received entry as alternates:
Yusuke Takahashi Xia ZihaoThe following players received entry from the qualifying draw:
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