CA37

CA 37, CA-37, or California 37 may refer to:


 * California's 37th congressional district, a congressional district in the U.S. state of California
 * California State Route 37, a state highway in the northern part of California
 * USS Tuscaloosa (CA-37), a United States Navy cruiser
 * California 37 (album), the sixth studio album from pop rock band Train
 * Calcium-37 (Ca-37 or 37Ca), an isotope of calcium
 * Caproni Ca.37, an Italian aircraft