<p>Diphtheria is a notifiable disease in Niger. From 2013 to 2022, Niger has officially notified 325 cases of diphtheria. In order to contribute to the improvement of the diphtheria surveillance system, we are interested in the analysis of surveillance data. To our knowledge, no study on this subject has yet been conducted in Niger. The objective was to assess the quality of the data and to describe in terms of time, place, and persons the diphtheria cases notified in Niger from 2013 to 2022.</p>