145

145 may refer to:

• 145 (number), a natural number
• AD 145, a year in the 2nd century AD
• 145 BC, a year in the 2nd century BC
• 145 (dinghy), a two-person intermediate sailing dinghy
• 145 (South) Brigade, a regional brigade of the British Army that saw active service in both the First and the Second World Wars
• 145 (New Jersey bus), a New Jersey Transit bus route
• 145 Adeona, a main-belt asteroid
• Alfa Romeo 145, a 3-door hatchback