Grell may refer to:
People with the surname Eduard Grell (18001886), German composer, organist, and music teacher Glen Grell (born 1956), Republican member of the Pennsylvania House of Representatives H. J. Grell (1866–?), American politician Karl Gottlieb Grell (1912–1994), German zoologist and protistologist Mervyn Grell (1899–1976), Trinidadian cricketer Mike Grell (born 1947), American comic book writer and artist Miranda Grell (born 1978), English Labour party politician found guilty of making false statements against her political opponent
Other Grell (Dungeons & Dragons), a creature in the role-playing game Dungeons & Dragons Grell Sutcliff, a character in the manga and anime series Black Butler "The Grell", an episode of The Outer Limits