These data were compiled for the U.S. Fish and Wildlife Service to assist them with updating the current status of the species Bartram's Stonecrop (Graptopetalum bartramii). Objective(s) of our study were to survey selected sites within the of Bartram's Stonecrop for future management and protection. These data represent summary population counts at selected known sites for the Federally listed Threatened plant species, Bartram's Stonecrop (Graptopetalum bartramii). These data were collected in the southern Arizona portion of the species' range, stratified across Sky Island Mountain ranges from the Rincon Mountains south to the Atascosa Highlands, just north of the Mexican border. Sites were selected to represent a range of local population sizes and physiographic and vegetative conditions, to provide data on population trends across this portion of the species' limited range. These data were collected by the U.S. Geological Survey / Southwest Biological Science Center from on-site field surveys. These data can be used to assess population trends of Bartram's Stonecrop at selected sites within its range.