Ryan Lannon (born December 14, 1982) is an American former professional ice hockey defenseman who last played for Vaasan Sport in the Liiga (Finnish Elite League).

[2] Lannon was assigned to Pittsburgh's AHL affiliate, the Wilkes-Barre/Scranton Penguins, for the entirety of his entry-level contract, helping the "Baby Pens" to the Calder Cup playoffs in each season.

After 7 games with the Monsters, Lannon was released and briefly joined the Worcester Sharks before leaving for Europe to sign with Finnish team, KalPa of the SM-liiga, on January 27, 2011.

Despite the option to return to previous club, KalPa, with a lingering back injury Lannon opted to retire from professional hockey on April 18, 2013.

[13] After a four-year retirement, Lannon made a surprising comeback to professional hockey for the 2017–18 season in signing an ECHL contract with inaugural hometown club, the Worcester Railers on October 4, 2017.

[15] In the following off-season, Lannon continued his comeback in returning abroad to sign a one-year deal with English club, Milton Keynes Lightning of the EIHL on July 25, 2018.