Pirbright is a village in Surrey, England. Pirbright is in the borough of Guildford and has a civil parish council covering the traditional boundaries of the area. Pirbright contains one buffered sub-locality, Stanford Common near the nation's farm animal disease research institute. The village's grade II* listed medieval church has a large Boulder grave for explorer Henry Morton Stanley. The nearby section of Hodge Brook is also known as the Congo Stream, between Ruwenzori Hills and Stanley Pool.