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

* Climax CR1, a 2015 British sports car * Aquila CR1, a 2008–present Danish race car

* 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 {{Letter-NumberCombDisambig