Leucostoma simplex is a European species of fly in the family Tachinidae.
Canada, United States, Argentina, Chile, Uzbekistan, China, British Isles, Czech Republic, Hungary, Moldova, Poland, Romania, Slovakia, Ukraine, Denmark, Finland, Sweden, Andorra, Bosnia & Herzegovina, Bulgaria, Corsica, Croatia, Greece, Italy, Macedonia, Portugal, Serbia, Slovenia, Spain, Turkey, Austria, Belgium, France, Germany, Netherlands, Switzerland, Kazakhstan, Iran, Mongolia, Russia, Transcaucasia, Cape Verde, Sierra Leone, Australia. Recorded from Hawaii as an immigrant.