No mention of who wins the House Cup, but it probably wasn’t Gryffindor. The Gryffindor team won the Cup even though Harry Potter was in detention with Dolores Umbridge – Ginny Weasley was the Seeker and caught the Snitch (HBP24).
Gryffindor wins the Quidditch Cup (1996)
Date June, 1996
Type of Event Wizarding world