This study investigated the causal relationship between Federal Government Expenditure and economic growth in Nigeria. It is expected that the Federal Government Expenditure should lead to an increase in economic growth especially in a developing economy like Nigeria. To establish the causal relationship between the variables, the study disaggregated federal government expenditure into various components of both capital and recurrent expenditure and applied the Granger Causality test using secondary data. The findings show that some components of federal government expenditure revealed bidirectional causality, unidirectional causality without feedback, while independent relationship was established between some of the variables.