The XXVI International Symposium on Lepton Photon Interactions at High Energies will take place in San Francisco, California from June 24-29, 2013. The Conference follows the tradition of a long series of high energy physics conferences, the International Symposia on Lepton and Photon Interactions at High Energies. The program features plenary sessions covering topics of major interest to the particle physics community. A poster session will be organized where students and young postdocs may present their work. The conference is hosted by SLAC National Accelerator Laboratory and will take place at the UCSF Mission Bay Conference Center.