Edouard Carpentier	57/06/14	Chicago, IL
Defeats the NWA world champion Thesz when Thesz cannot continue due to a back injury.
Killer Kowalski	58/05/03	Boston, MA
Sometime between 58/04/26 and 58/05/31.
Bearcat Wright	61/04/04	Boston, MA
Jackie Fargo	61/05/30	Boston, MA
Ted Blassie	64/08/27	Boston, MA
Jackie Fargo [2]	64/10/01<
Vacant in 66 when Fargo leaves the area.
[...]
Buddy Fuller #	66<
Recognized as the IWA World champion.
[...]
Frank Scarpa	67/04/27	Boston, MA
Wins tournament; vacant in 69/01 when Scarpa dies in the ring.
Gypsy Joe Gonzales	69
Wins tournament; title vacant; promotion closes in 75.
Jay Lethal	06/12/01	Chicopee, MA
Defeats Spike Dudley when the title is revived with the permission from the Santos' family.
John Walters	07/05/12	Springfield, MA
Too Cold Scorpio	08/03/29	Danbury, CT
John Walters [2]	08/06/28	Danbury, CT
Justin Credible	09/03/29	Webster, MA
Held-up/vacant after a match against John Walters on 09/08/02.
Spike Dudley	10/01/02	Webster, MA
Defeats John Walters in tournament final.