Tanzania, Uganda and Kenya have been receiving larger amount of official development assistance (ODA) compared to the rest of the East African Community countries. Therefore this study aims at assessing the impact of ODA on economic growth for to those three East African Community countries for the last 35 years from 1980-2014. The study employed the autoregressive distribution lag (ARDL) approach geared by Eviews9 application software for all estimations with the inclusion of other important independent variables like terms of trade, foreign direct investment, education and health. All countries’ ODA estimated results confirmed to have positive and significant effect on their economic growth. Just in the short run, ODA flowing to Kenya and Uganda proved to have a negative significant effect on the economic growth. However in the long run both countries’ ODA effects were positive. Tanzania had a significant positive effect for short and long run. In line with ODA, education and health found to have positive significant short and long run effects on the economic growth of East African countries. However in the previous years the human development factors were negatively affecting the growth, therefore the reverse suggested signs of improvements in the human development.