Latino No Fumes: Protege tu Salud was a smoking cessation demonstration project carried out in 2003 to 2004 that recruited Spanish-speaking smokers in 8 Connecticut cities. Recruitment was through radio and TV announcements, by mail, and at clinics and hospitals. 252 current smokers — mainly of Puerto Rican ancestry — signed up for the program; 75% of them attended one or more of the program's 6 weekly, group counselling sessions. One third of the registrants attended at least 5 of the sessions offered. Attendance of one or more sessions was only 55% for summer or winter groups, but 98% for sessions held in the fall. For the summer or winter sessions (only), attendance at one or more sessions was significantly greater in small than in larger cities. At program end, 14% of the participants were verified nonsmokers (self-reported abstinence and carbon monoxide readings < 9 ppm). The reported quit rates were 18% and 13%, respectively, at 3 and 6 months. The amount of attendance was not significantly related to the reported end of program quit-rates. Nearly all nonsmokers at program end had attended groups conducted by just 3 (of the 7) trained counsellors, who were presumably more effective in helping these Latino smokers to quit.