CR1 or CR-1 may refer to:
Vehicles Aircraft Cessna CR-1, an American air racer Fiat CR.1, a 1920s Italian biplane fighter aircraft
Automobiles Climax CR1, a 2015 British sports car Aquila CR1, a 2008–present Danish race car
Other uses Complement receptor 1, a protein CR-1 visa, a United States immigrant visa that allows a spouse of a US citizen to enter as a conditional permanent resident CR-1 gene is about Teratocarcinoma-derived growth factor 1