Leo is an astrological sign, which is associated with the constellation Leo. Under the tropical zodiac, Leo is occupied by the Sun from July 23 to August 22, and under the sidereal zodiac, it is currently from August 17 to September 16. The opposite sign to Leo is Aquarius.

Leo is the fifth sign of the Zodiac and is associated with creativity and drama. Individuals born under this sign are thought of to have a proud, honest, generous, self-motivated, charismatic, warm-hearted, and enthusiastic character, but one which is also prone to conceit, bullying, rigidity, intolerance, and snobbery. In terms of anatomy, Leo is said to rule the heart, upper area of the spine, and the back in general. In terms of geography, Leo is linked with Peru, the Czech Republic, Slovakia, Romania, and Italy. According to some astrologers Leo is a barren sign.

In mythology Leo is often associated with the Greek myth of the Nemean Lion which was killed by Heracles during one of his twelve labours, and subsequently put into the sky, as well as the mythological figure of Penelope, from the Greek myth of the Trojan War. Leo is also associated with the Greco-Roman god Apollo and sometimes also the gods Helios/Sol, Ra, and Huitzilopochtli and the goddess Sunna.