One of the national health objectives for 2010 is to reduce the prevalence of cigarette smoking among adults to </=12% (objective 27.1a). To assess progress toward this objective, each year CDC analyzes self-reported data from the National Health Interview Survey (NHIS). This report summarizes findings for 2007, which indicated that approximately 19.8% of adults were current smokers in 2007, a decrease of 1.0 percentage point from 2006 (20.8%). Cigarette smoking has declined during the past 40 years among all sociodemographic subpopulations of adults; however, the declines during the past decade have been smaller than in previous decades. The proportion of current everyday smokers who made a quit attempt during the preceding year decreased 7.2 percentage points from 1993 (47.0%) to 2007 (39.8%). During 1993-2007, young adults (aged 18-24 years) consistently had the highest prevalence of quitting for >1 day during the preceding year (59.3% in 1993 and 53.1% in 2007). Prevention of initiation and smoking cessation at all ages is beneficial in reducing morbidity and mortality. Clinicians should strongly advise smokers to quit and recommend they use effective cessation treatments. Health insurers, health insurance purchasers, and health systems should assist clinicians in making effective treatments available by including counseling and medications for smoking cessation as covered benefits and should support effective community interventions for cessation, including increased excise taxes, mass media campaigns, and smoke-free laws.