The study examined the impact of the external sector aggregates on economic growth in Nigeria for the period 1980- 2016. The external sector aggregates used were external debt, exchange rate and export. A combination of correlation analysis and Error correction mechanism was employed in this study. Pre-estimation tests showed no evidence of multicollinearity and all the variables were integrated of order one, I (1). Johansens cointegration test showed four cointegrating equations indicating the existence a long-run relationship which provides a reason for error correction modeling. The error correction results showed that EXR had a negative and significant impact on economic growth while external debt (EXD) and export (EPP) had positive and significant impact on GDP, respectively. The ECM term had the hypothesized negative sign and was statistically significant at 5% level. Economic growth adjusts to long-run at the speed of 29.98% per annum. There was no serial correlation problem. Results are therefore appropriatre for policy analysis. The study concluded that external sector aggregates have significant impact on economic growth in Nigeria but the impact could be positive or negative depending on the variable of interest. Among other things the study recommended that there should be promotion of the country’s export trade and stimulation of domestic production.