Michael Kemp, believed to be in his 50s, fell ill shortly after he had left Bloomfield Road and passed away soon after.
"As we scored the winning goal I looked up in to the stand and the first person I picked out was Kempy celebrating, a big smile on his face just like so many times before," said Liz Edwards, a fellow fan.
"I cannot believe what happened so shortly afterwards. A loyal Town fan home and away, who also loved following the Academy. I shall miss my football chats with him and seeing him at games."
As yet, no cause of death has been revealed.