T17 may refer to:

Armored vehicles

• T17 Deerhound, an American six-wheeled armored car
• T17E1 Staghound, an American four-wheeled armored car
• T-17 tank, a Soviet tankette

Aviation

• English Electric Canberra T.17, a British trainer aircraft
• New Gulf Airport, in Wharton County, Texas, United States
• SAAB-MFI T-17, a Danish trainer aircraft
• Thorp T-17, an American aircraft prototype

Rail and transit

Lines

• T17 line, of the Stockholm Metro
• T17/18 Beijing-Mudanjiang Through Train

Stations

• Kasai Station, Tokyo, Japan
• Miyakojima Station, Osaka, Japan
• Ōyachi Station (Hokkaido), Sapporo, Hokkaido, Japan
• Ueda Station (Nagoya), Nagoya, Aichi Prefecture, Japan
• Uzumasa Tenjingawa Station, Kyoto, Japan
• Zōda Station, Sanuki, Kagawa Prefecture, Japan

Weapons

• Shansi Type 17, a Chinese pistol
• T17E3, an American autocannon

Other uses

• Estonian national road 17
• T17 road (Tanzania)
• German torpedo boat T17