T18

T18 may refer to:

Aircraft

 * Slingsby T.18 Hengist, a British glider
 * Thorp T-18, an American homebuilt aircraft

Armoured vehicles

 * T18 Boarhound, an American armoured car
 * T18 Howitzer Motor Carriage, an American self-propelled gun
 * T-18 tank, a Soviet tank

Lines

 * Annapolis Road Line, of the Washington Metropolitan Area Transit Authority
 * T18 line, of the Stockholm Metro
 * T17/18 Beijing-Mudanjiang Through Train

Rolling stock

 * GER Class T18, a British steam locomotive
 * Prussian T 18, a tank locomotive
 * Tatra T18, a Czehoslovak draisine

Stations

 * Hara Station (Nagoya), Aichi, Japan
 * Hibarigaoka Station (Hokkaido), Sapporo, Hokkaido, Japan
 * Orange Town Station, Sanuki, Kagawa Prefecture, Japan
 * Tenjimbashisuji Rokuchōme Station, Osaka, Japan
 * Urayasu Station (Chiba), Japan

Other

 * Edwards syndrome, or trisomy 18
 * Estonian national road 18
 * T18 road (Tanzania)
 * GERMAN TORPEDO BOAT T18
 * Toyota T-18, a Toyota Corolla model sold in Australia