Gallier is a surname that may refer to:
Billy Gallier (1932–2011), English association football player Howard Gallier (1872–1955), English association football player James Gallier (1798–1866), architect, born Gallagher in Ireland and changed name to Gallier when moving to New Orleans James Gallier, Jr. (1827–1868), architect, son of James Jean Gallier (born 1949), French and American logician
See also Gallagher (surname) Galler, another similar surname Gallier Hall, the former New Orleans city hall, built by James Gallier Gallier House, the New Orleans home of James Gallier, Jr. Irena Gallier, fictional protagonist of Cat People (1982 film) TSV Großbardorf, a German association football club nicknamed Gallier (the German word for Gauls)