A toilet bowl ventilation system exhausts air in and around the toilet bowl to an area adjacent to the room in which the toilet is located. The toilet bowl ventilation system includes an odor exhaust system which is configured to be installed within the interior cavity of a toilet. The odor exhaust system includes a fan positioned within a housing. The system further includes a controller that regulates power to the fan. Upon activation, the system is operable to transport air from in and around the toilet bowl, through the housing, and to an area adjacent to the room in which the toilet is located (e.g. outdoors).