| Tourney Name: | Asian Club Championship |
| Year: | 1990–1991 |
| Dates: | 1 July 1990 – 29 July 1991 |
| Venues: | Dhaka (final rounds) |
| Num Teams: | 21 |
| Champion Other: |  Esteghlal |
| Count: | 2 |
| Second Other: |  Liaoning FC |
| Third Other: |  Pelita Jaya Jakarta |
| Fourth Other: | April 25 |
| Matches: | 30 |
| Goals: | 73 |
| Top Scorer: | Samad Marfavi (6 goals) |
| Player: | Abbas Sarkhab |
| Young Player: | Majid Namjoo-Motlagh |
| Goalkeeper: | Ahmad Reza Abedzadeh |
| Prevseason: | 1989–90 |
| Nextseason: | 1991 |
The 1990–91 Asian Club Championship was the 10th edition of the annual Asian club football competition hosted by Asian Football Confederation.Representative clubs of 30 Asian countries played games in this tournament. Esteghlal FC from Iran won the final and became Asian champions for the second time. They are championed in 1970 as Taj.
Esteghlal qualified 2–1 on aggregate.
The Gulf Cooperation Council Club was cancelled due to the crisis in the region; the participants would have been 
Bahrain Club, Al-Arabi, Al-Nassr and Al-Sharjah, who all withdrew.
Played in Quetta, Pakistan
Played in Dhaka, Bangladesh
Run parallel with ASEAN Club ChampionshipPlayed in Singapore
Played in Pyongyang, North Korea
Played in Dhaka, Bangladesh
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