This paper investigated the linear and causal relationships between insurance sector activity and economic growth in Nigeria based on annual data for the period 1981-2012 using Augumented Dickey Fuller test, Phillips-Perron test, Johansen Cointegration test, Pairwise Causality test and Ordinary Least Square Regression Analysis via Microsoft 7.1 econometric software. The overall results show that insurance sector activity exerts a statistically significant positive relationship with economic growth in Nigeria. A one unit increase in insurance consumption (CINSS) would bring about 31.79 units rise in real gross domestic product (RGDP). The causality test conducted revealed that there is a bidirectional causal relationship between insurance s...