Lienhart is a surname. For origin and meaning, see Lienhard. Notable people with the surname include:
Andreas Lienhart (born 1986), Austrian footballer Georges Lienhart (1886–1952), French World War I flying ace Johann Lienhart (born 1960), Austrian cyclist Philipp Lienhart (born 1996), Austrian footballer
See also Lienhard Lienhardt Linhart Linhardt