Laennec may refer to:
People Guillaume François Laennec (1748–1822), French physician René Laennec (1781–1826), French physician and musician Laënnec Hurbon (born 1940), Haitian sociologist
Places Laënnec, a quarter of the 8th arrondissement of Lyon, France Laënnec Glacier, a glacier in the Palmer Archipelago, Antarctica
Other uses Doctor Laennec, a 1949 French historical drama film