Codan or CODAN may refer to: Codan, an Australian manufacturer and supplier of communications, metal detection, and electronic equipment Codan A/S, a Danish insurance company Codan, a Danish rubber hose producer (Codan Rubber Danmark ApS) with global manufacturing sites Codan, a Danish company that produces health care products in Portugal, Denmark, Germany, United States, Switzerland and Italy CODAN, acronym for "Carrier Operated Discriminator Anti-Noise", a squelch circuit in a radio receiver

Many of the Danish companies are named after Codanus sinus.