CL4

CL4, CL-4 or CL.IV may refer to:


 * Canadair CL-4 North Star Mk.1
 * Halberstadt CL.IV, a German ground attack aircraft of World War I
 * Hannover CL.IV, a prototype escort fighter built in Germany during World War I
 * USS Omaha, the lead ship of Omaha class of light cruiser of the United States Navy
 * USS Little Rock, a Cleveland-class light cruiser of the United States Navy
 * Tetrachloride (Cl4)