Nigeria is presently facing serious security challenges and instability that threaten our existence as people of one destiny. This article examines the important roles agriculture can plan in ensuring our national security. Vocational agriculture is a skill acquisition training programme for youth to be self-employed and self-reliance in agricultural production for empowerment. In addition, democratic principles and rule of law must be enshrined in our political life for equity, fairness and justice. The roles of agriculture in ensuring national security are in the areas of reduction in rural- urban migration, youth unemployment and growth in industry. One major cause of insecurity and instability in a nation is the mass movement of unemployed youths to the urban Centre’s in search of jobs. They easily become available tools for use in promoting insecurity. If these youths are well trained in vocational agriculture, with basic skills acquisition in the various disciplines of agriculture and given the necessary assistance, they can be self-reliant. This will drastically reduce rural-urban migration, thereby creating an enabling environment for effective participation in nation building and development: therefore security is guaranteed. The purpose of this article is to examine how agriculture can be used as a tool in solving the problem of insecurity in Nigeria which can bring about a lasting peace thereby leading to national development. Some of the ways agriculture can help in reducing insecurity challenges can be training the youths in modernized faming, farm produce processing, farm produce systemized storing, farm produce packaging and farm produce distribution. For this to be achieve the government must seriously look into the Fulani herdsmen activity and agricultural policies that are not favorable to the farmers. The SWOT Analysis of agriculture in Nigeria would be used for analyzing and discussing the strength, weakness, opportunities and threat of using agriculture as a tool for solving security challenges in Nigeria.