Just as humans need peace of mind to be able to achieve success in their daily endeavors, so do communities require peace and security for sustainable community development. Though conflicts are part and parcel of human existence, the role of community leaders in ensuring peace and safety in communities cannot be overlooked. This is because they are the closest to the people and due to their positions in the community, are well respected. They are able to wield a lot of influence over the people in their various communities. This paper, therefore, examined the concept of peace, security, leadership and community leadership as well as the importance of peace and security in community development. It also identified the roles of community leaders in advancing peace and security in the community. In conclusion, the paper pointed out that there is need for serious collaboration between government, non-government agencies and community leaders if the desire for peace and security in communities will be achieved. It also recommended that capacity building programmes be organized for community leaders to make them more effective in their role of ensuring peace and security in the community.