The study is an attempt to investigate content analysis of diagrammatic representation in lower Secondary School Geography Textbook based on diagrammatic typology. The study analysed and compared the frequency of the diagrams and the importance of them for the study of the subject ‘Geography’. Content analysis is this study categorizes the diagrams, drawings, maps, charts, graphs of the textbook. On a whole there are about 12 iconic diagrams, 30 graphical representations, 14 schematic diagrams. There are 12 maps of India and 2 maps of the world. The results confirm that there should be more use of symbolic diagrams and a better distribution of graphical representation throughout the textbook.