A study on insect biodiversity was carried out in Addis Ababa in Ankorcha forest andrnSheger Park. Different parameters such as diversity index, species richness, frequency,rnabundance, distribution were measured. Sampling was done using sweeping net from differentrnmicrohabitats of each ecological setting. In the forest, the presence of eighteen families of insectsrnwhich belong to six orders were observed. In the park, twenty-five families of families of insectsrnwhich belong to seven orders were recorded. Order Diptera was found to be the dominating orderrnin both settings.rnIn Ankorcha forest, highest diversity of insects was observed in the natural forest habitat inrnall seasons. In the wet season, the best even distribution of insects was observed in the grass landrnhabitat. But, in the dry season insects were best evenly distributed in the artificial forest habitat.rnIn Sheger Park, the highest diversity of insects was observed in the mixed vegetation habitat.rnInsects were best evenly distributed in the flowers and grass mixed habitat in the wet season. Butrnin the dry season, grassland habitat was the best habitat regarding even distribution of insects. InrnAnkorcha forest, the most similar habitats in the distribution of insects in both the wet and dryrnseason were natural forest and grassland habitat. In Sheger park, the highest similarity of insectsrnwas seen in flowers and grass mixed habitats and mixed vegetation habitat in all seasons. InrnAnkorcha forest, the highest habitat association was observed in the artificial forest habitat. InrnSheger Park, the grassland habitat was the habitat which showed the highest habitat association.rnThe t-test result of the comparison of insect abundance in wet and dry seasons of both Ankorcharnforest and Sheger Park showed significance difference. But when insect abundance of ShegerrnPark and Ankorcha forest were compared during the respective wet season and dry season nornsignificant difference were observed.