Julia Migenes (born March 13, 1949) is an American soprano working primarily in musical theatre repertoire. She was born on the Lower East Side of Manhattan to Juan and Julia Migenes, parents of Puerto Rican and Irish descent, respectively. (Her stepfather, Costas Makis, was of Greek descent.) She is sometimes credited as Julia Migenes-Johnson. She attended The High School of Music & Art in New York City. Migenes played Tevye's second daughter, Hodel, in the original Broadway production of the long-running musical Fiddler on the Roof. She played Ciboletta in the 1973 film Eine Nacht in Venedig (re-released 2008). She also starred in the 1984 film of Carmen.

Migenes' year of birth has been disputed with the years 1943 (supported by the 1950 United States census and by the plausibility of known milestones in her career), 1945, 1948 (which she has used), and 1949 (used in most reference sources) all being cited. As a child, Migenes performed the role of "Ngana" in the first national tour of the Rodgers and Hammerstein musical South Pacific; she alternated in the role with her sister Maria. Also in the cast were her brother, John (1940-1993), in the role of Jerome, and her half-sister, Jeanette (1926-2003), as Bloody Mary's assistant (and understudy to Bloody Mary). Reportedly, the siblings made enough money from the tour to buy their family a small house in the Bronx.