G18

G18 may refer to:

Roads

 * G-18 (Michigan county highway)
 * County Route G18 (California)
 * G18 Rongcheng–Wuhai Expressway, in China

Vehicles

 * ARM Juan Aldama, an Auk-class minesweeper of the Mexican Navy
 * Chase G-18, an American combat glider
 * EMD G18, an American diesel locomotive
 * Fiat G.18, an Italian airliner
 * HMS Battleaxe (G18), a Weapon-class destroyer of the Royal Navy

Other uses

 * Glock 18, an automatic handgun
 * Prince G-18, a car engine
 * Xplore G18, a cellular phone