Demographics on national, regional, and global Pentecostalism provide an essential backdrop to almost every kind of quantitative or qualitative study done on other aspects of Pentecostalism. This article outlines both the history and the research findings related to the subject of defining, categorizing, and counting Pentecostals. Subjects covered include early attempts to count Pentecostals, the development of taxonomies of different types of Pentecostals and Charismatics, and statistical estimates of Pentecostals and Charismatics by type.
The following tables represent the results of analysis of data on religion for all of the countries of the world which appear in the World Religion Database (Johnson and Grim 2008). These data are collected at the national level from a number of sources including censuses, surveys, polls, religious communities, scholars, and others.
This article offers analysis of religious affiliation for 18 categories of religion for the globe and six continents: Africa, Asia, Europe, Latin America, Northern America, and Oceania. Estimates of religious affilia¬tion are made for four dates, 1970, 2000, 2018, and projections for 2030. Annual average growth rates are provided for two 30-year periods, 1970–2000 and 2000–2030. These global and continen¬tal tables are aggregated from country data in the World Religion Database.
Vast efforts are put into the collection of statistics in every country of the world relating to religious adherence. Quantitative tools in the context of demography – births, deaths, conversions, defections, immigration, and emigration – provide a comprehensive view of demographic changes in religious diasporas, which are created by the migration of people worldwide. Utilizing the taxonomies of religions and peoples from the World Christian Database (WCD) and World Religion Database (WRD), a preliminary examination of religious diasporas shows 859 million people (12.5% of the world’s population) from 327 peoples in diasporas around the world. The continuing trend of religious migration around the world is both increasing and intensifying religious diversity, especially in the former Christian West. This paper outlines some key issues relating to religious diversity in the twenty-first century and how the movement of peoples worldwide contributes to those issues.