E18 or E-18 may refer to: E18 error, a Canon digital camera error code County Route E18 (California), a County route in California DRG Class E 18, a class of German electric locomotives European route E18, a non-continuous road and ferry route in the United Kingdom and Fennoscandia E18, a postcode district in the E postcode area of London HMS E18, a submarine of the Royal Navy E18 Album, an album by the band Enlightenment (software) version 0.18, a window manager Jōshin-etsu Expressway, route E18 in Japan Kajang Dispersal Link Expressway, route E18 in Malaysia