Presents data on prisoners under jurisdiction of federal or state correctional authorities on June 30, 2007, collected from the National Prisoner Statistics series. This annual report describes changes in the prison population during the first six months of 2007, compared to changes from yearend 2000 through yearend 2006. It details the incarceration rates for prisoners sentenced to more than 1 year by jurisdiction, the number of incarcerated males and females, and the number of prisoners admitted into and released from federal and state jurisdiction. The bulletin also presents data on the total number of inmates held in custody in prisons or jails on June 30, 2007. It provides estimates of the custody population by gender, race, and age. The custody incarceration rates for these groups are also included. Counts of the number of non-citizens and individuals under age 18 held in custody are included. See also Jail Inmates at Midyear 2007.

• Between January and June 2007, the prison population increased by 1.6% (or 24,919 prisoners), compared to a 2% increase during the first six months of 2006.
• The number of prisoners sentenced to more than 1 year increased 1.7% between December 31, 2006 and June 30, 2007, or at about the same rate as the total number of prisoners under jurisdiction.
• Between 2000 and 2007, the number of inmates in custody in prisons or jails increased by 367,200. Male inmates (315,100) accounted for 86% of the increase to the custody population. Female inmates (52,100) made up the remaining 14%.