Abstract: A toilet disinfectant dispenser for use with a toilet of the type having a tank with tank lid. A water supply is connected to the tank by a water inlet pipe controlled by a float valve assembly. A toilet bowl is operatively connected to the tank by a ball valve on a tank drain. The ball valve is connected to a lift chain on a trip lever of a flush handle on the tank. An overflow pipe extends upwardly into the tank and is connected to the bowl. The dispenser comprises a container having an inlet port and an outlet port. A soluble disinfectant tablet is carried within the container. An element at the outlet port is for detachably securing the container to a top end of the overflow pipe. A facility is for feeding some of the water from the float valve assembly into the top end of the overflow pipe and into the inlet port of the container.