The Ottawa Jail Hostel is a hostel operated by Hostelling International and located at 75 Nicholas Street in the city of Ottawa, Ontario, Canada. The hostel was originally the Carleton County Gaol, more commonly known as the Nicholas Street Gaol or Ottawa Jail. When the jail closed in 1972, Hostelling International purchased and converted the building, but left much of the structure intact, allowing guests to experience spending a night "in jail".