Does A Landlord Have To Disclose A Haunted Rental?

As satarnag pointed out, you cannot be required to point out what may be considered fiction to many. You can likely expect numerous breaches of lease agreements if it is indeed haunted. As for the legalities of non disclosure you would have to ask a real estate attorney in your state if local landlord tenant law requires such. There are some people that might just jump at the chance to live there if it truly is haunted.