Joos is a surname. Notable people with the surname include:
Amaat Joos (1855–1937), Belgian priest, educationalist, dialectologist and folklorist Gustaaf Joos (1923–2004), Belgian Roman Catholic cardinal Hans Joos (1926–2010), German theoretical physicist Hildegard Joos (1909–2005), Austrian painter Joseph Joos (1878–1965), German intellectual and politician Martin Joos (1907–1978), American linguist and German professor Peter Joos (born 1961), Belgian fencer Stefan Joos (born 1963), Belgian fencer Victor J. Joos (1938–2019), American politician
See also Joos (given name)