Giller may refer to:
People Agaton Giller (1831-1887), patriotic Polish activist Doris Giller, Canadian literary critic Scotiabank Giller Prize, an annual Canadian English language literary award Edward B. Giller (1918-2017), United States Air Force general Stefan Giller (1833-1918), Polish Romantic poet Walter Giller (1927–2011), German actor
Other uses Giller (fishing), a 19th-century term used in the Chesapeake Bay area for a gillnet fisherman Giller (mountain), a mountain in the Rhenish Massif, North Rhine-Westphalia and Hesse, Germany