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 , the lead ship of Omaha class of light cruiser of the United States Navy , a Cleveland-class light cruiser of the United States Navy Tetrachloride (Cl4)
See also
1989 CL4, a synonym for 9911 Quantz, a main belt asteroid orbiting the Sun
C4L (disambiguation) CL (disambiguation)