T21

T21 may refer to:

Aircraft

• Junkers T.21, a German reconnaissance aircraft produced in the Soviet Union
• Slingsby T.21, a British training glider

Rail and transit

• Minami-morimachi Station, in Kita-ku, Osaka, Japan
• Myōden Station, in Ichikawa, Chiba, Japan
• SJ T21, a Swedish locomotive
• Yakuriguchi Station, in Takamatsu, Kagawa Prefecture, Japan

Ships and boats

• ARV Amazonas (T-21), a tank landing ship of the Venezuelan Navy
• German torpedo boat T21
• Mistral T-21, a Canadian sailboat

Other uses

• T21 (rocket), an American chemical warfare rocket
• Down syndrome, or trisomy 21
• Estonian national road 21
• T21 road (Tanzania)
• T21 Light Tank, an American light tank
• ThinkPad T21, a notebook computer
• Trisomie 21, a French cold wave group