This study examines the impact of foreign direct investment on economic growth overtimes in the Nigerian economy. The study considers annual times series data from 1981 to 2018 using ordinary least square method. The results from the estimation reveals that foreign direct investment has been very instrumental and significant to the growth process of the economy overtimes. The contribution of foreign direct investment to growth is further improved when interacted with the level of human capital in the country. Also, the study found that the contribution of foreign direct investment to growth has exhibited increasing return to growth for the Nigerian economy. We however recommend that efforts should be made to improve the level of human capital while necessary steps should be taken to entice foreign investors into the country.