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Background and Aim: In East Asia, colonic diverticulosis develops most commonly in the right colon and is known to have different characteristics compared with left‐sided one. This study was designed to investigate whether right‐colonic diverticulosis is associated with posteriori dietary patterns. Methods: We retrospectively reviewed medical records of prospectively collected cohort that received health check‐up in Korea between May 2011 and January 2012. Their anthropometric data, biochemical results, medication history, underlying diseases, colonoscopic findings, and dietary data obtained from semi‐quantitative food‐frequency questionnaire were analyzed. Three dietary patterns were identified using factor analysis: healthy dietary pattern (vegetables, fish, seaweed, fruits, and beans), meat dietary pattern (red meat, processed meat/fish, fried noodle, poultry, and cephalopods), and snack dietary pattern (bread, sweets, dairy products, nuts, and rice cake). Results: Out of the total 1911 patients, 203 (10.6%) had right‐colonic diverticulosis, 21 (1.1%) had pan‐colonic diverticulosis, and 12 (0.6%) had left‐colonic diverticulosis. Among the total, none of the three patterns were associated with right‐colonic diverticulosis, under adjustment with age, gender, body mass index, metabolic syndrome, and total energy intake. However, among women, meat dietary pattern was positively associated with right‐colonic diverticulosis (odds ratio 1.866, 95% confidence interval: 1.0983–3.173, P = 0.021). Conclusion: This study demonstrated that meat dietary pattern is positively associated with right‐colonic diverticulosis among women. [ABSTRACT FROM AUTHOR]