D18

D18 may refer to:
 * D-18 guitar
 * BRAZILIAN DESTROYER ESCORT Bracuí, a Cannon-class destroyer escort of the Brazilian Navy
 * Darmstadt D-18, a German sportsplane
 * Dublin 18, a postal district in Ireland
 * HMS Antrim (D18), a County-class destroyer of the Royal Navy
 * HMS Battler (D18), an Attacker-class escort carrier of the Royal Navy
 * HMS St. Kitts (D18), a Battle-class destroyer of the Royal Navy
 * Jodel D18, a French ultralight aircraft
 * LNER Class D18, a steam locomotive class
 * Progress D-18, a turbofan engine