In this study, oral malodor, dental and periodontal conditions, dental plaque, and tongue coating were assessed in 2,672 individuals aged 18 to 64 years. Data on volatile sulfur compounds were analyzed by gender, age group, and time measurements. The results of the study indicated that there were no significant differences observed in VSC between males and females in any age group. It was observed however, that in each age group, the measurements of oral malodor were at their highest in the late morning. Results also indicated a significant correlation between the VSC values, periodontal conditions, and tongue coating status. This suggests that oral malodor is caused mainly by tongue coating in the younger generation, and by periodontal disease combined with tongue coating in the older generation of the general population.