This study establishes the validity of the Prison Inmate Inventory for use among female inmates (N = 628). Contrast groups were used to establish construct validity; negative binomial regression analysis was used to confirm predictive validity. Female inmates who were arrested at a younger age demonstrated more severe problems with violence, antisocial traits, distress, adjustment to prison life, and judgment. Results from the negative binomial analysis revealed that inmate risk (low and severe) predicted expected counts of probation revocations, parole revocation, and escape attempts. Expected counts were not related to race/ethnicity in this sample.