Space Launch Complex 1 (SLC-1) is an inactive launch complex at Vandenberg Space Force Base in California.

Both sites were built in 1958 for the never activated 75th Strategic Missile Squadron for launches of the Thor-Agena to support the CORONA series of reconnaissance satellites for the CIA.

SLC-1 continued to launch various spy satellites such as the KH-4 for the Department of Defense throughout the 1960s, following the transfer of vehicle operations from the CIA to the National Reconnaissance Office.

During the mid-60s, as part of the phasing out of the Thor-Agena, both pads were modified to launch the succeeding Thorad-Agena throughout the end of the decade.

Ultimately, thanks to the KH-4 getting replaced by the larger KH-9 and KH-11 as well as the pads' proximity to the more actively used Space Launch Complex 2, SLC-1 eventually saw the end of active service by the 1970s, and have since been disused.