The present study evaluated the personality characteristics and psychopathology of internet sex offenders (ISOs) using the Minnesota Multiphasic Personality Inventory, Second Edition (MMPI-2) to determine whether ISO personality profiles are different to those of general sex offenders (GSOs; e.g. child molesters and rapists). The ISOs consisted of 48 convicted males referred to a private sex offender treatment facility for a psychosexual risk assessment. The GSOs consisted of 104 incarcerated non-internet or general sex offenders. Findings indicated that ISOs scored significantly lower on the following scales: L, F, Pd and Sc. A comparison of the MMPI-2 scores of the ISO and GSO groups indicated that ISOs are a heterogeneous group with considerable within-group differences. Current findings are consistent with the existing literature on the limited utility of the MMPI-2 in differentiating between subtypes of sex offenders. (Contains 1 figure and 1 table.)