172

172 may refer to:

• 172 BC
• AD 172
• 172 (number), the natural number following 171 and preceding 173
• Cessna 172 "Skyhawk", a single engine, high wing, light airplane produced by Cessna Aircraft Company
• 172 BC
• British Rail Class 172, a Diesel multiple unit built by Bombardier Transportation part of the Turbostar family in 2010