Extensive deliberation has taken place over the pivotal significance of foreign direct investment in promoting economic growth. This debate has included development experts, scholars, aid donors, and beneficiaries in general, with a particular focus on Kenya. Despite this, there are not many empirical studies that look at how foreign direct investment affect Kenya's economy as a whole. Using data from 1976 to 2020, this research explores the link between Kenyas economic growth and foreign direct investment. To ascertain if adjustments to one variable cause changes in the other, it next applies causal analysis. The findings indicate that the amount of economic growth currently seen is largely influenced by foreign direct investment.The results show that by strategically enhancing investment plans and managing aid monies properly, Kenya might increase its economic development.