Crouch, 20, has played 25 senior games since being taken with pick No. 23 in the 2013 National Draft.
“I love the Club and I think we showed this year that we’re on the right track,” the midfielder said.
“It was great, especially for young players like myself, to play finals and that experience has pushed us to get better.
“I’m really happy to get the deal done, and I’m looking forward to working hard with the boys over the pre-season and continuing to improve as a player.”