To determine the trends in diverticulosis over the past owing to data scarcity from Northern China. Methods 26 463 colonoscopies performed from January 2011 to December 2015 were reviewed respectively. The trends in diverticulosis were analyzed in terms of age growth and year increase. Results 951 colonic diverticulosis were identified. A preponderance of right-sided diverticulosis were demonstrated, accounting for 72.87% of included subjects. The proportion of colonic diverticulosis increased significantly (P < 0.01 for trend) from 2.78% (112/4 028) in 2011 to 4.98% (309/6 208) in 2015. Multivariate analysis showed older age and male gender were independent risk factor for the incidence of diverticulosis. Conclusion Colonic diverticulosis has been increasing in Northern China, where a rapid aging and urbanization is ongoing.