The three datasets were used in a model estimating the current and future persistence of 222 populations of southern hognose snakes, as estimated as part of the USFWS Species Status Assessment. Because these datasets contain information about sensitive species at risk of overcollection and harassment, they do not contain any spatial identifying information. The "HESIM_locs" dataset contains a list of southern hognose snake occurrence records with associated year of observation and population ID. The "SEsnakes_locs" dataset contains a list of non-target snake species occurrence records with associated year of observation and population ID. The "HESIM_pops_all" dataset contains a list of southern hognose snake populations with associated habitat metrics of current and future conditions derived from publically available spatial datasets, a habitat suitability model by Crawford et al. 2019, and estimated persistence probability from the analysis. A full description of the methodology and results of the southern hognose snake status assessment is available in the publication: Crawford, B.A., Olds, M.J., Maerz, J.C., and Moore, C.T., 2019. Estimating population persistence for at-risk species using citizen science data. Biological Conservation. In review. The full Species Status Assessment: U.S. Fish and Wildlife Service, 2019. Species status assessment for the southern hognose snake (Heterodon simus). Version 1.1, April 2019. Atlanta, GA. Available at https://ecos.fws.gov/ServCat/DownloadFile/168148.