Can a vampire go to heaven?

Sure why not. At least in The Bible, there is no prohibition against vampires going to heaven. The Bible says only one thing keeps people out of heaven. And that is by dying in unbelief. If anyone dies "rejecting" God in their hearts - they get sent to Satan's hell. That is what the Christian Bible tells us. God wants everyone to go to heaven (II Peter 3:9) and John 3:16 is very clear about Jesus dying for EVERYBODY - no exceptions. God is not prejudiced at all. Galatians 3:28

On the other hand, since Vampires in the literature are typically unrepentant murderers, another Christian perspective is that they would not go to Heaven. Even in the Twilight version of Vampires, if you can't die, you wouldn't be able to go to heaven. Luckily, since vampires do not actually exist, it is unlikely to ever come up.