Abstract: The study looked at the impact of monetary policy on the economic performance in Nigeria. The study made use of unit root and cointegration test so as to correct the mistake of most previous studies that were based on spurious regression. The study found out that for the periods covered in the study. There was negative relationship between interest rate and GDP while there was positive relationship between inflation rate and interest rate. Effort should therefore be made by government to reduce the interest rate charge by bank, which will thereafter affect the level of overall growth of the economy.