Idalis may refer to:
;People named "Idalis" or "Idalys"
*
Idalis DeLeón (b. 1966), an American actress, singer, and television host
*
Idalys Ortiz (b. 1989), a Cuban judoka (judo practitioner) and Olympic medal winner
;Ships
*
USS ''Idalis'' (SP-270), a United States navy patrol vessel and training ship in commission from 1917 to 1919
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