The larval habitats of the mosquito Aedes aegypti L (Diptera-Culicidae) were investigated in urban Da r es Salaam, using larval traps (old tyres, vegetations, outdoor water storage containers and flower pots). The study was carried out in the four sampling sites namely, Vingunguti, Julius Nyerere International Airport (J NIA), Mbagala and Mkuranga (Vikindu). The aim was to asse ss the influence of habitat changes in urban Dar es Salaam (the capital city of the united republic of Tanzania) on the preferred breeding habitats of Ae. Aegypti mosquitoes and its possible public health implicati ons on the residents of the City. Aedes aegypti mosquitoes bred in all the habitats sampled. Old tyres recorde d the highest number of Ae. aegypti mosquitoes followed by water storage containers and vegetation. Flower-pot s habitat was the least preferred, with the lowest number of Ae. aegypti mosquitoes.Other mosquito species belonging to fiv e genera were also collected and these were found to live in sympatry with Ae. aegypti larvae. Statistical analysis revealed a significan t difference in species occurrence in the four larval habitats sampled. The availability of the habitats to support the breedi ng of Ae. aegypti mosquito, which are potential vectors of urban yel low fever, Chikungunya fever, Dengue fever and Rift Valley Fever Viruses implies that theresidents of D ar es Salaam City are at risk of mosquito-borne dis eases should an outbreak occur. It is therefore important that, residents of the City are enlightened on env ironmental factors that contribute to mosquito breeding and th at, the Government together with the community inst itute proper sanitation measures to reduce mosquito breed ing habitats.