Abstract Persons with mental illnesses use tobacco at
significantly higher and heavier rates than the general
population, and suffer greater tobacco- related morbidity
and mortality. However, there are few existing tobacco
cessation interventions for these individuals. This study
examined two tobacco cessation interventions, a telephonic
quitline intervention (counseling and nicotine replacement
therapy) and a community-based group counseling inter-
vention with adults currently receiving community mental
health services. At 6-month follow-up, both groups dem-
onstrated significantly reduced tobacco use, but partici-
pants who received both quitline services and the group
counseling intervention were significantly more likely to
have a 50% tobacco use reduction. Across groups, the
overall intent-to-treat cessation rate was 7%. Tobacco
dependence, depression symptoms, and psychotic symp-
toms decreased significantly for all treatment groups, while
health and mental health functioning increased. Findings
suggest that common community tobacco cessation ser-
vices are effective for this population.