CARA has completed a longitudinal study of women religious in the United States drawing on data reported by the religious institutes of women listed in the Official Catholic Directory. The contributions of women religious in the United States continue to be evident today in Catholic institutions of education and healthcare across the country, but there are, and have been, countless other contributions as well. Over the years, these valiant women have adapted to changing circumstances and forged ahead despite challenges to their way of life and ministry. The U.S. Catholic Church is indebted to the ministerial efforts and sacrifices made by women religious in the past and present. This CARA Special Report is an effort to disentangle the story of women religious in the United States that is hidden in the numbers.