Namesakes
Fictional Characters from Television:
1 character
Kenny McCormick 1997 South Park 
Most Valuable Players:
1 winner
Frank McCormick 1940 baseball
Notable Actors and Entertainers:
1 actor
Carolyn McCormick 1959-
Notable Musicians:
1 singer
Mac Miller (a.k.a. McCormick) 1992-2018
Olympic Medalists:
1 gold, 1 silver/bronze
(gold) Pat McCormick 1952; 1956 diving - platform; diving - springboard
(silver/bronze) Kelly Anne McCormick 1984; 1988 diving - springboard