This constellation contains many bright stars, such as Regulus (α Leo), Denebola (β Leo) and Algieba (γ1 Leo). Many other fainter stars have been named has well, such as Zosma (δ Leo), Ras Elased Australis (ε Leo), Adhafera (ζ Leo), Chort (θ Leo), Al Minliar al Asad (κ Leo), Alterf (λ Leo), Ras Elased Borealis (μ Leo) and Subra (ο Leo).
Leo also contains many bright galaxies of which the twins M65, M66 and M95, M96 are the most famous.
In some cosmologies, Leo is associated with the classical element Fire, and thus called a Fire Sign (with Aries and Sagittarius).