The 2020 project shows shifting complexity of organized religion. Church historians, sociologists, and statisticians are going county by county, denomination by denomination, group of believers by group of believers, to compile the most complete record of organized religion in the country: the 2020 US Religion Census. The official decennial census conducted by the United States government does not measure religious affiliation. Most data about religion in America comes from polling, but polling has its limits. So every 10 years, the Association of Statisticians of American Religious Bodies (ASARB) counts and maps religious congregations in the US. The project is a…