The International Scout Organization (scout.org) has a membership report that lists numbers of registered scouts in each country with a national scouting organization. The report (as of December 31, 2016), shows six countries had a scouting organization with more than 1 million registered members.
1. Indonesia: 21,599,748
2. India: 3,647, 843
3. United States (BSA): 2,536,872
4. Philippines: 1,934,255
5. Kenya: 1,312,422
6. Bangladesh: 1,112,293
Source Report: https://www.scout.org/sites/default/files/library_files/Grand Total Membership with Gen