Mario is officially around 24 to 25 years old according to Shigeru Miyamoto, the creator of the character. This age was stated in a 2005 interview and aligns with various official sources including the Super Smash Bros. Melee trophy description and the Super Mario Bros. movie portrayal

. Although Mario first appeared in 1981, making the character 43 years old in terms of creation date, his in-universe age is intended to be mid-20s to reflect his youthful energy and vitality