In the Dungeons & Dragons fantasy role-playing game, a vampire is an undead creature. A humanoid or monstrous humanoid creature can become a vampire, and looks as it did in life, with pale skin, haunting red eyes, and a feral cast to its features.

Are undead considered humanoid 5e?

It's irrelevant: humanoid is a type of creature (see the first chapter of the Monster Manual). Undead and constructs are different types and are ineligible targets. As are giants, dragons, etc.

Does Hold person work on vampires 5e?

@JeremyECrawford sageadvice states hold person wouldn't work on a vampire because theyre not humanoid. ... See the introduction of the Monster Manual for the types: humanoid, dragon, giant, undead, and more.