NOTE: Originally known as the Keystone State Cruiserweight Championship, this title was revived as the Union Cruiserweight Championship in 2012 and was then merged with the PWA Internet Championship and WORLD-1 Under-30 Championship to create the Northern Lights Cruiserweight Championship. In 2016, the title was further unified to include the Steel City Pro Wrestling Canadian Hybrid championship.
- JOHN McCHESNEY
- defeated AERO! to win the inaugural championship (18 April 2003)
- defeated AERO! and MDogg Matt Cross to retain the title (20 June 2003)
- defeated Sterling James Keenan to retain the title (22 August 2003)
- defeated Kevin Grace to retain the title (20 September 2003)
- STERLING JAMES KEENAN
- defeated John McChesney to win the title (11 October 2003)
- title declared vacant (Spring 2004)
- ALEX VEGA
- declared Union Cruiserweight champion (April 2012)
- SHAWN “ICE” LaFLEUR
- defeated Union Cruiserweight Champion Alex Vega and Colby Corino to unify his PWA Internet title with the Union Cruiserweight and World-1 Wrestling Under-30 Openweight titles (14 April 2012)
- title declared vacant due to injury (May 2012)
- ALEX VEGA (2)
- defeated Ashley Sixx to win the vacant title (07 July 2012)
- BUCK GUNDERSON
- defeated Alex Vega, Rip Impact and The Amazing Darkstone in gauntlet match to win the title (29 Dec 2013)
- defeated Scotty O’Shea to retain the title (09 March 2014)
- lost via disqualification to Alex Vega to retain the title (25 May 2014)
- ALEX VEGA/TARIK (3)
- defeated Buck Gunderson to win the title (14 September 2014)
- defeated Taylor Kay-Deen to retain the title (SCPW, 18 October 2015)
- defeated Sexxxy Eddy to retain the title (SCPW, 29 November 2015)
- defeated Ashley Sixx to retain the title (SCPW, 28 February 2016)
- defeated Brent Banks to retain the title (SCPW, 24 April 2016)
- defeated Sebastian Suave to unify the Northern Lights Championship with the SCPW Canadian Hybrid title (19 June 2016)
- title declared vacant (Spring 2017)
- SHANE SABRE
- defeated Addy Star, Vaughn Vertigo and Gabriel Fuerza to win the vacant title (08 August 2019)
- defeated LIONEL KNIGHT to retain the title (06 December 2019)