| 2020 Bangkok Challenger II | |
|---|---|
| Date | 20–26 January |
| Draw | 48S / 16D |
| Surface | Hard |
| Location | Bangkok, Thailand |
| Champions | |
| Singles | |
 Federico Gaio | |
| Doubles | |
 Gonzalo Escobar /  Miguel Ángel Reyes-Varela | |
The 2020 Bangkok Challenger II was a professional tennis tournament played on hard courts. It was part of the 2020 ATP Challenger Tour. It took place in Bangkok, Thailand between 20 and 26 January 2020.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 CZE | Jiří Veselý | 108 | 1 |
 JPN | Go Soeda | 110 | 2 |
| ITA | Paolo Lorenzi | 114 | 3 |
 FRA | Antoine Hoang | 117 | 4 |
 HUN | Attila Balázs | 128 | 5 |
 CHN | Zhang Zhizhen | 137 | 6 |
 SVK | Martin Kližan | 142 | 7 |
| ITA | Federico Gaio | 150 | 8 |
 AUT | Sebastian Ofner | 156 | 9 |
 NED | Robin Haase | 161 | 10 |
| ITA | Roberto Marcora | 171 | 11 |
 UZB | Denis Istomin | 174 | 12 |
 CAN | Peter Polansky | 180 | 13 |
 KAZ | Dmitry Popko | 184 | 14 |
 IND | Ramkumar Ramanathan | 185 | 15 |
| NED | Botic van de Zandschulp | 193 | 16 |
The following players received wildcards into the singles main draw:
Thanapet Chanta Palaphoom Kovapitukted Michael Mathayomchand Kasidit Samrej Wishaya Trongcharoenchaikul The following player received entry into the singles main draw using a protected ranking:
The following players received entry into the singles main draw as alternates:
The following players received entry from the qualifying draw:
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