Background: A healthy diet is one of the most important aspects of health. Nowadays, scrutinizing dietary patterns rather than specific nutrients have prime importance. The purpose of this study is to identify the dominant dietary patterns among adults in Gonabad City in 2019. 
Methods: In this cross-sectional study, 250 individuals aged 18-70 years living in Gonabad were selected by multistage random sampling from urban zones 1, 2, and 3 covered by community health centers. Regular dietary intakes of individuals over the past year were obtained using the food frequency questionnaire, and demographic characteristics were obtained via face-to-face interviews. Factor analysis was used to identify dominant dietary patterns. The relationship between dominant dietary patterns and demographic characteristics was assessed employing a Chi-square test. 
Results: Participants’ ages range from 36.40±13.16 years, of whom 44.8% were male, 82.4% were married and 60% were employed. Two healthy and unhealthy dietary patterns were identified. There was a statistically significant relationship between healthy dietary patterns and variables of age (P<0.001), sex (P=0.01), and occupation (P<0.001). Moreover, there was a statistically significant relationship between unhealthy dietary patterns with variables of age (P<0.001), sex (P=0.014), and the number of family members (P=0.035). Demographic characteristics are among the influential factors affecting the type of adult food pattern in Gonabad. It is suggested to consider demographic factors in determining the relationship between dietary patterns and disease.
Conclusion: Demographic characteristics are among the influential factors affecting the type of adult food pattern in Gonabad. It is suggested to consider demographic factors in determining the relationship between dietary patterns and disease.