| No. | Champion | Championship change | Reign statistics | Notes | Ref. |
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| Date | Event | Location | Reign | Days |
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| NWA North American Heavyweight Championship(Buffalo/Cleveland version) |
| 1 | Moose Cholak | October 1968(NLT) | NWF show | N/A | 1 | [Note 1] | Still champion as of December 11, 1968. | |
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| 2 | Johnny Powers | 1968(NLT) | NWF show | N/A | 1 | [Note 2] | | |
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| 3 | Bulldog Brower | 1969(NLT) | NWF show | N/A | 1 | [Note 3] | | |
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| 4 | Johnny Powers | May 1969(NLT) | NWF show | N/A | 2 | [Note 4] | | |
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| 5 | Bulldog Brower | January 1, 1970 | NWF show | Cleveland,OH | 2 | [Note 5] | | |
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| 6 | Johnny Powers | July 1, 1970(NLT) | NWF show | N/A | 3 | [Note 6] | | |
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| 7 | Bulldog Brower | July 2, 1970 | NWF show | Cleveland,OH | 3 | [Note 7] | | |
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| NWF North American Heavyweight Championship |
| 8 | Ernie Ladd | December 5, 1970 | NWF show | Akron, OH | 1 | 117 | | |
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| — | Vacated | April 1, 1971 | — | Cleveland,OH | — | — | Championship vacated after a match between Ladd and Tex McKenzie | |
| 9 | Johnny Powers | April 3, 1971 | NWF show | Cleveland,OH | 4 | 5 | | |
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| 10 | Ernie Ladd | April 8, 1971 | NWF show | Cleveland,OH | 2 | 49 | | |
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| 11 | Waldo Von Erich | May 27, 1971 | NWF show | Cleveland,OH | 1 | 174 | | |
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| 12 | Johnny Powers | November 17, 1971 | NWF show | Buffalo, NY | 5 | 289 | | |
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| 13 | Johnny Valentine | September 1, 1972 | NWF show | Cleveland,OH | 1 | 21 | | |
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| 14 | Johnny Powers | September 22, 1972 | NWF show | Cleveland,OH | 6 | 0 | | |
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| — | Vacated | September 22, 1972 | — | — | — | — | Championship vacated pending a review of the match. | |
| 15 | Johnny Valentine | October 1972(NLT) | NWF show | N/A | 2 | [Note 8] | Won the rematch. | |
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| 16 | Ernie Ladd | November 22, 1972 | NWF show | Buffalo, NY | 3 | 1 | | |
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| 17 | Johnny Powers | November 23, 1972 | NWF show | Cleveland,OH | 7 | 72 | | |
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| 18 | Karl Von Krupp | February 3, 1973 | NWF show | Akron, OH | 1 | 14 | | |
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| 19 | Johnny Powers | February 17, 1973 | NWF show | Akron, OH | 8 | 77 | | |
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| 20 | Eric the Animal | May 5, 1973 | NWF show | Cleveland,OH | 1 | 11 | | |
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| 21 | Johnny Powers | May 16, 1973 | NWF show | Buffalo, NY | 9 | 31 | | |
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| 22 | J.B. Psycho | June 16, 1973 | NWF show | Buffalo, NY | 1 | 8 | | |
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| 23 | Johnny Powers | June 24, 1973 | NWF show | Akron, OH | 10 | 221 | | |
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| 24 | Ernie Ladd | January 31, 1974 | NWF show | Cleveland,OH | 4 | [Note 9] | | |
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| 25 | Ox Baker | March 1974(NLT) | NWF show | N/A | 1 | [Note 10] | | |
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| 26 | Ernie Ladd | March 14, 1974 | NWF show | Cleveland,OH | 5 | 4 | | |
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| 27 | Johnny Powers | March 18, 1974 | NWF show | Akron, OH | 11 | [Note 11] | | |
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| Super Pro-Wrestling North American Heavyweight Title |
| 28 | Dominic DeNucci | April 1974(NLT) | NWF show | N/A | 1 | [Note 12] | | |
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| 29 | George Steele | May 31, 1974 | NWF show | Pittsburgh,PA | 1 | [Note 13] | | |
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| 30 | Dominic Denucci | June 21, 1974(NLT) | NWF show | N/A | 2 | [Note 14] | | |
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| 31 | Stan Stasiak | July 27, 1974(NLT) | NWF show | N/A | 1 | [Note 15] | Sometime between July 5, 1974 and July 27, 1974. | |
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| 32 | Ox Baker | August 20, 1974 | NWF show | N/A | 2 | 7 | | |
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| 33 | Ernie Ladd | August 27, 1974 | NWF show | N/A | 6 | 62 | | |
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| IWA North American Heavyweight Championship |
| 34 | Tarzan Tyler | October 28, 1974 | NWF show | N/A | 1 | 70 | In January 1975 billed as champion upon promotion startup. | |
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| 35 | Ox Baker | January 6, 1975 | NWF show | Savannah, GA | 3 | [Note 16] | | |
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| — | Vacated | May 1975 | — | — | — | — | Championship vacated when Baker left the promotion. | |
| 36 | Bulldog Brower | July 1975 | NWF show | N/A | 4 | [Note 17] | Awarded, or possibly by defeating Mighty Igor or Johnny Powers after Baker leaves the promotion; still champion as of August 1977. | |
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| NWF North American Heavyweight Championship |
| 37 | Johnny Powers | January 1979(NLT) | NWF show | N/A | 12 | [Note 18] | Billed as champion for a tour of Japan. | |
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| 38 | Seiji Sakaguchi | January 26, 1979 | NWF show | Okayama,Japan | 1 | 238 | | |
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| 39 | Tiger Jeet Singh | September 21, 1979 | NWF show | Sendai,Japan | 1 | 608 | | |
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| — | Deactivated | April 23, 1981 | — | — | — | — | The championship retired after announcement of the IWGP. | |