C67

C67 or C-67 may refer to:
 * Berlin Defence (chess), a chess opening
 * Bladder cancer
 * Caldwell 67, a barred spiral galaxy
 * Caudron C.67, a French biplane
 * Douglas C-67 Dragon, an American transport aircraft
 * Hours of Work and Rest Periods (Road Transport) Convention, 1939 of the International Labour Organization