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Objectives. We investigated variables associated with quitting behaviors among current, daily, and nondaily young adult smokers in the United States. Methods. Data from the national 2003 Tobacco Use Special Cessation Supplement to the Current Population Survey were analyzed to identify factors associated with quit attempts and serious intention to quit among young adult smokers aged 18 to 30 years (n=7912). Results. Daily smokers who smoked 20 or more cigarettes per day, had their first cigarette within 30 minutes of waking, and smoked no usual type were less likely than were their comparison groups to have 1 more or quit attempts. Nondaily smokers who were male, Hispanic, and smoked no usual type of cigarette were also less likely than were their comparison groups to report 1 or more quit attempts. Although unemployed nondaily smokers were more likely than were the employed to report intention to quit, nondaily smokers with an annual family income of $25 000 to $49 000 were less likely than were higher-income families to report intention to quit. Conclusions. Nicotine dependence measures were significantly associated with quitting and intention to quit among daily smokers, but sociodemographics were associated with quitting and intention to quit among nondaily smokers.