This report contains the following data on sex offenders: active prison population, prison admissions, active probation population, and probation starts. Data used for the report relate primarily to offenders who have committed felony crimes, such as rape, sodomy, aggravated sodomy, child molestation, aggravated child molestation, incest, and statutory rape. Highlights of report findings include: (1) Sex offenders in prison or on probation are almost exclusively male and are more likely than the other prisoner groups studied to be white; (2) The majority of sex offenders in the current offender population have child victims; (3) Among active inmates whose sex crime is a secondary or prior offense, almost all have a violent personal crime as major offense; (4) Sex offenders have the lowest return-to-prison rate of all crime types, but the percentage of sex offenders entering prison by parole or probation revocation has been increasing; (5) Offenders with substance abuse problems, including sex offenders, return to prison at higher rates than those with no known substance abuse problems; and (6) Seven out of 10 sex offenders terminated probation successfully. Appendix, glossary, bibliography, index