Tyson is a fictional character in Rick Riordan's Percy Jackson and the Olympians series. He is a cyclops. Percy Jackson, the main character of the series, is his half-brother. They have the same father, the Greek god Poseidon. He first appears as a homeless boy in the second book of the series, The Sea of Monsters the second book

Tyson is played by Douglas Smith in Percy Jackson: Sea of Monsters, the film adaption of The Sea of Monsters.