The United States Air Force's 2d Space Launch Squadron (2 SLS) was a space lift unit located at Vandenberg AFB, California. It was inactivated after the last Titan IV launch in 2005.
On 18 May 1998, the 2 SLS and 4 SLS merged into one squadron, the 2 SLS. The merged squadron was responsible for overseeing launch operations at Vandenberg AFB. The reason for the merger was the similarity in missions performed by both units.