2 Squadron may refer to:

Air Force

• No. 2 Squadron RAF
• No. 2 Squadron RAF Regiment
• No. 2 Squadron RAAF
• No. 2 Squadron RFC - which became No. 2 Squadron RAF in 1918
• 2 Squadron RNZAF
• 2 Squadron SAAF
• No. 2 Squadron, Indian Air Force
• 2nd Airlift Squadron - Polish Air Force
• 2d Space Operations Squadron
• No. 2 Airfield Defence Squadron RAAF
• 2d Fighter Squadron
• 2d Airlift Squadron

Naval Units

• 2nd Battle Squadron (United Kingdom)
• 2nd Frigate Squadron (United Kingdom)
• 2nd Battlecruiser Squadron (United Kingdom)