The Rangers are in on arguably the top college free agent.

Quinnipiac junior Collin Graf has caught the attention of the Blueshirts front office at 4 Penn, The Post has learned.

The Bobcats’ leading scorer, who has posted 48 points in 22 games this season, is naturally drawing a lot of interest around the NHL as he wraps up his collegiate career — and the Rangers have been one of several teams keeping tabs on the right wing/center.

Graf, who is a strong candidate for the Hobey Baker Award this season, played an integral role in Quinnipiac capturing its first national championship last year.

The Massachusetts native memorably assisted on the game-winning goal in the national semifinal before he scored the game-tying goal with 2:47 left in regulation to force overtime in the championship game.

Recording points in 32 of Quinnipiac’s 41 games last season, Graf not only matched the program’s Division 1 record with 59 points but also tied for the NCAA lead with 38 assists.

After such a prolific season, Graf was one of five players invited to the Predators’ development camp. The previous summer, he had attended the Panthers’ prospect camp.

The 21-year-old Graf is averaging 1.55 points per game this season for the Bobcats, who advanced to Friday’s ECAC semifinals in Lake Placid with a 5-2 win over RPI on Sunday.