Blos is a surname. Notable people with the surname include:
Anna Blos (1866–1933), German educator and politician Carl Blos (1860–1941), German painter Gabriel Blos (born 1989), Brazilian footballer Joan Blos (1928–2017), American writer and teacher Martina Blos (born 1957), German former sprinter Michael Blos (born 1976), German politician Peter Blos (1904–1997), German-American psychologist Wilhelm Blos (1849–1927), German politician
See also Lai Blos, two small lakes in the Grisons, Switzerland