This study examined the effect of investment on economic growth in Nigeria from1994 to 2023. Ex- facto research design was used with the use of secondary data extracted from Central Bank of Nigeria Statistical Bulletin 2024. Data collected was diagnosed with Descriptive Statistics Analysis, Augmented Dickey-Fuller (ADF) unit root test, Bound test Co-integration method, Granger Causality Test, Stability test and the Autoregresive Distributed Lag (ADRL) Model. The finding, shows that Private Foreign direct investment has negative significant effect on economic growth in Nigeria, Stock market investment has “positive but insignificant effect” on economic growth in Nigeria, Agricultural investment has “negative but significant effect on economic growth in Nigeria and Private equity investment has positive significant effect on economic growth in Nigeria. The study recommended amongst other that the government should implement policies that ensure foreign investments contribute to local economic development. This includes strengthening local content policies, encouraging reinvestment of profits within the country, and ensuring that FDI projects align with national development priorities. Additionally, streamlining regulatory frameworks will attract quality investments that have a positive impact on GDP and the government and regulatory bodies should improve corporate governance, enforce transparency, and incentivize local participation in the stock market. Strengthening financial literacy programs will also encourage more Nigerians to invest in equities.