Girault is a surname, and may refer to:
In people: Alexandre Arsène Girault (1884–1941), American entomologist. Arsène Napoleon Girault's great-grandson. Charles Girault (1851–1932), French architect Hubert Girault (b. 1957), Swiss electrochemist Joseph-Philibert Girault de Prangey (1804–1892), French photographer and draughtsman Olivier Girault (b. 1973), French handball player Ron Girault (b. 1986), American football safety Vivette Girault (b. 1943), French mathematician
In botany: Rosa 'Alexandre Girault', a rose cultivar originating from Orléans, France and developed in 1907 by Barbier Frères & Compagnie. It is not named after the American entomologist. See List of rose cultivars named after people.