Cf or CF may stand for:

• Cf. is an abbreviation for the Latin word confer, meaning "compare."
• Californium, symbol for the chemical element
• Call forwarding, a telecommunication service feature
• Canadian Forces, armed forces of Canada
• Center field(er), a defensive position in baseball
• Central African Republic, ISO country code
• ColdFusion, a web programming language
• Compact Flash, a solid state memory technology
• Compact Fluorescent, a small style of fluorescent lamp
• Cystic Fibrosis, an autosomal recessive hereditary disease
• Cluster fuck alias Charlie Foxtrot