The 9th Parachute Battalion was an airborne infantry battalion of the Parachute Regiment, raised by the British Army during the Second World War. The battalion was created in late 1942 by the conversion of the 10th Battalion, Essex Regiment to parachute duties. The battalion was assigned to the 3rd Parachute Brigade, alongside the 7th and 8th Parachute battalions, then part of the 1st Airborne Division but was later transferred to the 6th Airborne Division.

The Parachute Regiment, colloquially known as the Paras, is the airborne and infantry regiment of the British Army. The first battalion is part of the Special Forces Support Group under the operational command of the Director Special Forces. The other battalions are the parachute infantry component of the British Army's rapid response formation, 16 Air Assault Brigade. The Paras, along with the Guards, are the only line infantry regiment of the British Army that has not been amalgamated with another unit since the end of the Second World War.