C37 or C-37 may refer to: Vehicles Aircraft Caudron C.37, a French passenger biplane Cessna C-37, an American civil utility aircraft Gulfstream Aerospace C-37A Gulfstream V, an American military VIP passenger jet Gulfstream Aerospace C-37B Gulfstream G550, an American military VIP passenger jet Lockheed C-37 Electra, an American military transport Automobiles Dongfeng Sokon C37, a Chinese van Marshall C37, a British bus Sauber C37, a Swiss Formula One car Ships Corsair 37, an American trimaran sailboat , a C-class submarine of the Royal Navy Catalina 37, a yacht produced by Catalina Yachts Other uses C37 road (Namibia) Caldwell 37, an open cluster King's Gambit, a chess opening Route C37 (Massachusetts), a street in Boston SARS-CoV-2 Lambda variant, also known as lineage C.37