An estimated one out of every 49 adults in the United States were under some form of correctional supervision on a given day in 1988. One in every 27 men and one in every 194 women were being supervised. The probation population showed a 4.9 percent gain over the previous year's count. The increase occurred in every region, with the West and the Northeast reporting the highest gains and the South the lowest. The parole population grew 12.5 percent during 1988. Among the regions of the country, the parole populations in the Northeast showed the largest percentage increase during the year; States in the Midwest had the slowest growing parole population. More than 80 percent of those released from prison receive supervision in the community. Prisoners enter parole supervision either by a discretionary parole board decision or by fulfilling the conditions for a mandatory release. 4 tables.