This data release contains the R code to run an integrated population model (IPM) for the Cape Sable Seaside Sparrow (CSSS; Ammospiza maritima mirabilis), a federally endangered bird endemic to a small part of the Everglades in southern Florida, USA, and provides the parameter estimates from the model. The IPM synthesizes thirty years (1992-2021) of range-wide surveys, mark-resight, and nest monitoring data to estimate annual abundance, apparent survival, fecundity, and growth for six separately managed CSSS ‘subpopulations’ (A-F). A suite of hydrologic and fire metrics within occupied and potentially occupied areas for each subpopulation were calculated to evaluate the effects of hydroperiod on juvenile and adult survival, and the effects of water depth variability, amount of dry area, time since fire, and percent area burned on fecundity. Hydrologic metrics were derived from daily Everglades Depth Estimation Network water stage surfaces from 1991–2021 and fire metrics were derived from shapefiles of daily fire extent and dates for the years 1983–2021 from the National Park Service. Data and R code to calculate hydrologic and fire metrics are provided in this data release. CSSS data are not provided owing to restrictions on endangered species.