In response to inconclusive findings by extant empirical studies on government spendingeconomic growth nexus, this study explores the effects of aggregate public expenditure, recurrent government expenditure and capital government expenditure on economic growth, and the effect of economic growth on aggregate public expenditure. Using a time series data set from Nigerian context for the period between 1981 and 2018 and analysing same with OLS regression model after a pre-estimation unit root test, an impressive results emerged. First, the study found that whereas aggregate public expenditure positively affects economic growth, recurrent government expenditure and capital government expenditure have insignificant effects on economic growth. Second, the study found that economic growth positively affects government spending. These results offer an insight that would enable fiscal policy makers to insist on improved government spending.