"In 2016, an estimated 65% of all jail inmates were awaiting court action on a current charge. The remaining 35% were sentenced offenders or convicted offenders awaiting sentencing. Seventy percent of inmates were held in jail for felony charges."
The US Dept. of Justice's Bureau of Justice Statistics reports that at yearend 2016, 1,288,466 people were serving sentences in state prisons in the US, of whom 190,100 (14.75% of the total) had as their most serious offence a drug charge: 45,300 for drug possession (3.51% of the total), and 144,800 for "other" drug offenses, including manufacturing and sale (11.24% of the total).
"Since 2005, more than 60% of all jail inmates were awaiting court action on a current charge. About 4 in 10 inmates were sentenced offenders or convicted offenders awaiting sentencing. The growth in the overall jail inmate population since 2000 was due to the increase in the unconvicted population. Regardless of conviction status, about 68% of jail inmates in 2015 were held for a felony offense, and the remaining 32% were held for either misdemeanor (27%) or other offenses (5%) (not shown)."
" Almost half of sentenced federal prisoners on September 30, 2017 (the most recent date for which federal offense data are available) were serving time for drug trafficking (tables 14 and 15).
" More than a third (38%, or 64,300) of federal prisoners were imprisoned for a public-order offense, including 17% (28,300) for a weapons offense and 7% (11,100) for an adjudicated immigration offense.