How the Government Measures Unemployment
https://www.bls.gov/cps/cps_htgm.htm
Beyond the unemployed there are separate numbers published by BLS for those not in the labor force. This number is at about 95 Million.
Who is not in the labor force? https://www.bls.gov/cps/cps_htgm.htm#nilf
The numbers https://www.bls.gov/news.release/empsit.t01.htm