| 2023 International Challenger Zhangjiagang | |
|---|---|
| Date | 28 August – 3 September |
| Edition | 4th |
| Surface | Hard |
| Location | Zhangjiagang, China |
| Champions | |
| Singles | |
 Térence Atmane | |
| Doubles | |
 Ray Ho /  Matthew Romios | |
The 2023 International Challenger Zhangjiagang was a professional tennis tournament played on hard courts. It was the fourth edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Zhangjiagang, China between 28 August and 3 September 2023.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 CHN | Bu Yunchaokete | 215 | 1 |
| FRA | Térence Atmane | 218 | 2 |
 JPN | Kaichi Uchida | 240 | 3 |
| JPN | Rio Noguchi | 251 | 4 |
| AUS | Li Tu | 255 | 5 |
| TPE | |||
 LTU | Ričardas Berankis | 257 | 7 |
| AUS | James McCabe | 281 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry into the singles main draw as alternates:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Térence Atmane def. 
Mikalai Haliak 6–1, 6–2. Ray Ho / Matthew Romios def. 
Francis Alcantara / Sun Fajing 6–3, 6–4.
