This study examines the extent to which severely mentally disabled (SMD) pa
tients in one county mental health system were incarcerated in the local ja
il and examines characteristics of a sample (N = 30) of such individuals. W
e found that in the study year, 7.9% of known SMD patients had at least one
incarceration in the county jail. Diagnoses were predominantly in the schi
zophrenia spectrum with 70% also actively abusing substances at the time of
incarceration. The majority of crimes were non-violent and substance abuse
related. Half of the sample was judged to be candidates for diversion prog
rams. Our findings are consistent with recent literature confirming that su
bstance abusing SMD individuals are at high risk of incarceration and could
benefit from integrated mental health and substance abuse treatment.