Ilsa

Ilsa may refer to:

People

 * Ilsa J. Bick (fl. 1999–present), American science fiction writer
 * Ilsa Konrads (born 1944), Australian freestyle swimmer

Fictional characters

 * Ilsa Lund, in the 1942 film Casablanca
 * Ilsa, protagonist of a sexploitation film series starting with Ilsa, She Wolf of the SS (1975)
 * Ilsa Brandes, title character of Ilsa (novel), a 1946 novel by Madeleine L'Engle
 * Ilsa Pucci, from the TV series Human Target
 * Ilsa Shickelgrubermeiger, from the TV series The Suite Life of Zack and Cody
 * Ilsa Faust, in the films Mission: Impossible – Rogue Nation (2015), and its sequel Mission: Impossible – Fallout (2018)

ILSA

 * International Law Students Association, a non-profit association of students and lawyers dedicated to the promotion of international law
 * Interstate Land Sales Full Disclosure Act of 1968, US Congressional act passed to facilitate regulation of interstate land sales
 * Iran and Libya Sanctions Act, a 1996 act of the US Congress that imposed economic sanctions on firms doing business with Iran and Libya
 * Intermodalidad de Levante S.A., aka Iryo, a Spanish operator of high-speed trains
 * Instrument for Lunar Seismic Activity in Chandrayaan-3 will measure the seismicity around the landing site on Moon.

Other uses

 * Tropical Storm Ilsa (disambiguation), various cyclones
 * Ilsa (novel), a 1946 novel by Madeleine L'Engle