An emergency toilet shutoff assembly for shutting off flow of water into the tank of a toilet. The emergency toilet shutoff assembly includes a toilet assembly including a tank having side walls, and also including a float support member being disposed in the tank, and further including a float member being supported upon the float support member, and also including a pair of water conduits being disposed in the tank for filling the tank with water; and also includes a valve assembly being connected to the water conduits for shutting off flow of water into the tank