E18

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 Detektivbyrån
 * Enlightenment (software) version 0.18, a window manager
 * Jōshin-etsu Expressway, route E18 in Japan
 * Kajang Dispersal Link Expressway, route E18 in Malaysia