Hier is a surname. Notable people with the surname include:
Ethel Glenn Hier (1889–1971), American composer, teacher and pianist Marvin Hier (born 1939), dean and founder of the Simon Wiesenthal Center
See also Walter Hiers (1893–1933), American silent film actor Filesystem Hierarchy Standard (Linux man page: ) Hiers-Brouage, commune in France Haier, Chinese home appliances company