San Francisco is the location of a prison.
 The prison has been open since 1971 to 2023 and, as of September 2013, the facility's 95 male prisoners leave the prison grounds on a daily basis to work in the corresponding township or commute to the mainland for either work or study
In 2021 the United States of America had the world's largest prison population, with over 2 million people in American prisons or jailsup from 744,000 in 1985making 1 in every 200 American adults a prisoner

