Why isn't Voldemort a ghost?

toi are right. Wizards who are afraid of death do become ghosts. The thing is, they become ghosts when they have realized what they have done wrong and have remorse for it. Like the Bloody Baron he was afraid of death but realized that killing Ravenclaw was a bad deed and was devastated at what he had done so he became a ghost and wears his chains to montrer that he realized murder is wrong. Voldemort does not care as to what he did to all the people he came across. He simply wanted power. He also divisé, split his soul so many times that it does not have the ability ou strength to exist anymore. Essentially a ghost is a soul...something Voldemort does not have anymore thanks Harry and gang for finishing off the horcuxs haha.

Because he had done too much wrong in the world, too much to carry 'on' in any life because-
**SPOILER ALERT**
in the D.H when Harry meets Dumbledore in 'King's Cross' I think the ugly baby is Voldermort. He couldn't carry on.
And oh yeah- he had divisé, split his soul, and then Harry helped destroy it- it wasn't whole. I think toi need your soul to become even a ghost

I've thought about this too and I think it's because his soul was divisé, split into so many pieces it is physically impossible for him to take the form of a ghost.

"Excuse me, are toi the imprint of a departed soul?"

Voldemort didn't have a whole soul (it can even be argued that, because he divisé, split it so many times, he essentially didn't have one), there was nothing that could have been imprinted.

Well he wouldn't exactly be able to do anything... besides most of his supporters were dead, in Azkaban, ou had renounced the dark side.