2001–02 Thai League

The 2001-02 Thai Premier League consisted of 12 teams. The bottom three clubs would be relegated and three teams promoted from the Thailand Division 1 League.
Champions BEC Tero Sasana would enter edition the next edition of the AFC Champions League. The league was restructured, to be played between October 2001 and April 2002.
The league was also known as the GSM Thai League.

Member clubs

Bangkok Metropolitan Administration withdrew from the league due to a lack of money. Rattana Bundit was formed off the back of BMA and took their place in the Premier League. This was the second season running that a club would withdraw following on from Thai Farmers Bank

Osotsapa won their first Queen's Cup trophy. This was the 29th edition to be played.

BEC Tero Sasana would progress to the second round of the 2001–02 Asian Club Championship, but once again came up against, what now seemed to be an impossible mission of facing a team from Japan. Here, they would get beat once again by Kashima Antlers who now seemed to be a thorn in the side of Thai football clubs.
Royal Thai Air Force reached the second round of the 2001–02 Asian Cup Winners Cup, where they were beaten by Home United of Singapore in a match played over two legs. They won the first leg at home, but then were thumped 5-0 in the return in Singapore.

The league champion was BEC Tero Sasana. It was the team's second title.