Data files in this project were used in an integrated population model for three breeding populations of Wilson’s Warbler (Cardellina pusilla). Data span the years 1992-2008. Data include counts from the North American Breeding Bird Survey (https://www.pwrc.usgs.gov/BBS/RawData/; wiwa_bbs.csv), adult capture histories (wiwa_ch.csv) and age-specific capture data (wiwa_pdat.csv) from the Monitoring Avian Productivity and Survivorship program (http://www.birdpop.org/pages/maps.php), and covariate data derived from the ClimateNA (https://sites.ualberta.ca/~ahamann/data/climatena.html; wiwa_cmd_wt.csv and wiwa_tave_sp.csv) and National Centers for Environmental Prediction (NCEP) ⁄ National Center for Atmospheric Research (NCAR) Reanalysis (https://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.html; wiwa_wind.csv) data sets. Data were prepared in R (https://www.R-project.org/) and the model was implemented with JAGS (http://mcmc-jags.sourceforge.net/). Details of data use, including model code, are reported in Saracco and Rubenstein (in review): “Integrating broad-scale data to assess demographic and climatic contributions to population change in a declining songbird”.