Speed World (スピード・ワールド Supīdo Wārudo) is a series of Field Spell Cards used in the Yu-Gi-Oh! 5D's and Yu-Gi-Oh! ARC-V animes. Two cards of this series are also playable in the video games Stardust Accelerator, Reverse of Arcadia, and Over the Nexus. It is inherently linked to the "Speed Spell" archetype.

The cards in this series enable duelists to play a Turbo Duel.