Monica may refer to:

* Monica (entertainer), R&B singer and actress * Monica (given name), the given name "Monica" * Saint Monica * Monica (car) * Monica (grape) * Monica (rocket) * Monica tail warning radar * Monicagate, a term for the Monica Lewinsky scandal * 833 Monica, a planet * Cyclone Monica, a tropical cyclone * Santa Monica, California * Monica (Monica (Monicas Gang)), the main character of Monicas Gang comic strips. * A planet in David Webers science fiction Honorverse * A fictional country in the �on Flux universe * A song by The Kinks on their album The Kinks Are the Village Green Preservation Society * A song by Dan Bern on his album Fifty Eggs (Fifty Eggs (album)) * A song by Leslie Cheung, which was called "Song of the 20th century" in Hong Kong.