Peter Kirk Demmerle (September 6, 1953 – May 24, 2007) was an American football player. He played college football at the University of Notre Dame as a wide receiver and was a consensus first-team All-American in 1974. Demmerle was a member of the national championship team of 1973 which defeated top-ranked Alabama in the Sugar Bowl. A year earlier, he scored Notre Dame's only touchdown in the Orange Bowl; he was selected in the thirteenth round of the 1975 NFL Draft by the San Diego Chargers.