A lot. Source: https://www.prisonpolicy.org/reports/pie2020.html https://www.prisonpolicy.org/reports/pie2020.html If you look specifically at people serving a

A lot. Source: https://www.prisonpolicy.org/reports/pie2020.html https://www.prisonpolicy.org/reports/pie2020.html If you look specifically at people serving at least 1 year in a state prison (which is where most of the convicted prisoners are, as the link above shows), then it's a majority: "However, the Bureau of Justice Statistics reported that, as of the end of 2015, 54% of state prisoners sentenced to more than 1 year were serving time for a violent offense. 15 percent of state prisoners at year-end 2015 had been convicted of a drug offense as their most serious infraction." Source: https://en.wikipedia.org/wiki/Incarceration_in_the_United_States https://en.wikipedia.org/wiki/Incarceration_in_the_United_St...