Schlösser is a surname. Notable persons with that name include:
Karl Schlösser (1912–1982), German international footballer Louis Schlösser (1800–1886), German violinist and composer Pepijn Schlösser (born 1998), Dutch footballer Rainer Schlösser (1899–1945), German journalist and writer
See also Hans Müller-Schlösser (1884–1956), German poet and playwright Rose Marie Antoinette Blommers-Schlösser (born 1944), Dutch herpetologist and entomologist Schlosser Schlösser, German plural form of Schloss, a type of building