The 1966 interhall football championship game was played between Keenan Hall and the Lyons-Morrissey team. Keenan entered as the Division I champion and compiled a 3–0 record, while the Lyons-Morrissey team won Division III, defeated Cavanaugh in the semi-finals, and held a 4–0 record. The 1966 championship was the third consecutively to go unmentioned in all Notre Dame publications during the season. However, the Dome yearbook for the following schoolyear mentions Lyons as the defending interhall champion, which assumes they were the victors against Keenan. Anecdotal testimony by Lawrence Kazmerski of the Lyons team provided the 19–6 score and the site of the game.

Postseason

• The first pre-mandated interhall playoff form is tested. The extended postseason is born.

Miscellaneous

• The first edition of the Observer is published, supplanting the Scholastic is the primary source of information on interhall football.

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