The output from a low‐beam‐divergence KrF ultraviolet laser has been used to simultaneously trigger two multimegavolt gas‐filled switches emersed in a water dielectric. Focusing 55 mJ of laser energy into the interelectrode gap of each switch has produced simultaneity jitter of ≤1.7 ns for closure of both 2.40‐MV self‐breakdown voltage (SBV) switches. Both switches have displayed essentially identical switching behavior, with individual switch jitter ≲2.3 ns. The triggering delay to switch closure after laser irradiation of the switch has exhibited linear dependence upon switch voltage in the 60%–90% SBV region.