G18 may refer to: Roads G-18 (Michigan county highway) County Route G18 (California) G18 Rongcheng–Wuhai Expressway, in China
Vehicles , 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 , 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