Corruption is one of the main causes of inefficiency and poor productivity. This chapter looks at the relationship between banking failure, corruption, financial development, and economic growth in Nigeria during the period from 1989 to 2019. The work uses the autoregressive distributed lag (ARDL) cointegration and error correction model and the Granger causality test for the analysis of data. The results of the empirical analyses show a negative relationship between corruption and both financial development and economic growth. This shows that corruption is bad for both the financial sector and the economy. The result also shows that corruption is a good reason for causing bank failures in Nigeria. Hence, for financial development and economic growth, corruption must be reduced as much as possible if not eliminated. It is recommended to put the fight against all forms of corruption in Nigeria in top gear.