"Neos" (ネオス Neosu) is an archetype of cards, the principal one being "Elemental HERO Neos", used by Jaden Yuki in the Yu-Gi-Oh! GX anime. "Elemental HERO Neos" works with the "Neo-Spacians" to Summon powerful Neos Fusion Monsters via Contact Fusion. Most "Neos" Fusion Monsters have an improved version of the effect of the corresponding "Neo-Spacian" Fusion Material Monster.

In the TCG, due to several "Neos" cards including "Neo Space" in their TCG name instead (and "Neo Space" cards exclusively being "Neos" cards), "Neo Space" is considered a separate archetype from "Neos", but is supported by all cards that support "Neos" cards that could also affect "Neo Space" cards, such as "Elemental HERO Divine Neos".

Despite being unrelated to "Elemental HERO Neos", "Darkness Neosphere" is also part of this archetype due to having "Neos" in its name.