Strictly speaking, worms don’t have legs, so the title of this article is essentially about a fictional topic. However, many people ask us to identify “worms” with legs, and moreover worms have something kind of like legs – namely, setae (essentially, hair) – so we figured we should address the matter of worm legs, despite their non-existence (kind of like how we addressed worm eyes, which also don’t exist in any meaningful sense of the term “eyes”). Do many people think worms have legs? Yes. Is there any reason to mistakenly think that worms have legs? Yes. But do worms have legs? No. To sort out how these questions can have these answers, we address each in turn below.