CA45
# CA45

CA45, CA-45, or CA 45 may refer to:

* California's 45th congressional district, a congressional district in the U.S. state of California
* California State Route 45, a state highway in California
* USS Wichita (CA-45), a United States Navy cruiser
* Calcium-45 (Ca-45 or $^{45}Ca),$ an isotope of calcium
* Caproni Ca.45, an Italian aircraft
