Nigeria is a nation blessed with intellectuals, technocrats and abundant mineral resources, yet the majority of the citizens live in abject poverty. The effect of poverty is pervasive. A poor man is a problem for society and even unto himself. He is always angry, never productive and seeks succor in militia activities. Poverty to a large extent is the root cause of insecurity in Nigeria. Thus, the study examines the relationship between poverty and insecurity in Nigeria. A descriptive method was adopted and data was collected via a survey of six hundred (600) respondents using non-probabilistic sampling techniques. We anchored our investigation on some basic propositions arising from the frustration-aggression theory. Data collected were analyzed using correlation and linear regression analysis with the aid of the Statistical Package for Social Science (SPSS) version 21. The results among others showed that poverty has a positive and significant relationship with insecurity in Nigeria (r = 0.783). As predicted, the study also revealed that poverty exerts a positive and statistically significant impact on insecurity in Nigeria (r2 = 0.716). Therefore, the study recommends among other Nigerian government at all levels should care more about the welfare of the people by attending to their essential needs.