Do you want to just print copies for yourself? Or are you actually looking to publish it with a publisher? If the latter, it all depends on your discipline. If you're in the humanities, the more appropriate question might be: how do I turn my dissertation into a book? There are a number of books on this topic, so I'd start there (along with talking to your advisor).
If you want a vanity copy, you could go with a German publisher. Publishing is required in Germany to receive many degrees, so it is a bit different of a phenomenon there. I once had a German publisher contact me about publishing my MA thesis...