Currency devaluation in Nigeria from 2000 to 2015 had a significant impact on the country's economy. The study found that devaluation led to an increase in real GDP and external debt, but did not affect private domestic investment. Devaluation helped reduce imports, boost exports, and raise interest rates. However, it also caused inflation and unemployment in the short term. To address these issues, a mix of monetary and fiscal policies should be used to control inflation, with devaluation considered as a last resort to lift the country out of recession.