A national survey of inorganic chemists explored the self-reported topics covered in in-depth inorganic chemistry courses at the postsecondary level; an in-depth course is defined by the American Chemical Society's Committee on Professional Training as a course that integrates and covers topics that were introduced in introductory and foundation courses in a more thorough manner. Anecdotal evidence suggested that more than one type of in-depth course was offered in the undergraduate chemistry curriculum. Cluster analysis confirmed this evidence and revealed three distinct types of in-depth inorganic chemistry courses with unique topical profiles. These results confirm diversity in the inorganic chemistry curriculum and the need for awareness that our students leave degree programs with varying understanding of inorganic chemistry based on the coursework offered at their respective institutions.