Flos is a genus of butterflies in the family Lycaenidae.

Flos may also refer to:

Flos (book), a 1225 book by Fibonacci Flos Greig (1880–1958), Australian lawyer František Flos (1864–1961), Czech novelist The FLOS, Former Ladies of the Supremes, music group

See also Flo (disambiguation) Floss (disambiguation)