In this thesis, the researcher engages in emerging work in music in worship to deepen contemporary conversations about musical styles in worship. This thesis critically examines the missional character of music in worship in seven selected evangelical churches in the metropolitan city of Abeokuta, Nigeria in order to propose a sustainable model for promoting God’s missions. . The selected churches are The Assemblies of God Church, Four Square Church, The Baptist Church, The Church of Nigeria, Anglican Communion, The Redeemed Christian Church of God, The Apostolic Faith, and The Gospel Faith Mission International. The thesis has investigated how missional and to what extent these churches have effectively sought to implement the missionary mandate in the area of music in worship. The following specific objectives underpin the study: to establish the Biblical perspective of the missional character of music in worship in the life of the church, to study and outline the Theological perspective of the missional character of music in worship in the life of the church, to study the origin/history of music in the missional context, and outline the nature and emerging trends with regard to missional character of music in worship in the selected churches in Abeokuta, Nigeria, and to propose a sustainable model that can be adopted by churches to promote the missional character of music in worship effectively in Abeokuta, Nigeria. The following methods were used to achieve the objectives of the study: an exegetical study of relevant passages in the Scripture were engaged, relevant literature review on the Theological perspective of the missional character of music in worship in the life of the church were outlined, one-on-one interviews were carried out and self-administered interview questionnaires were served on the major leaders, worship leaders/choir members and key lay members of those selected churches in order to explore the origin/history of music in the missional context, its impact for good on the believers and non- believers, as well as the role, qualities and influence of the missional character of Music in Worship in seven different denominations and all the information gathered from questionnaires served was evaluated and logical conclusions drawn as appropriate to formulate a sustainable model that can be adopted by churches to promote the missional character of music in worship effectively in the city of Abeokuta, Nigeria, in the final instance. In closing, recommendations and conclusions are made to reassess and reconsider their missionary approaches, with a view to enhancing their ways of engaging music in their worship as the thesis goal explores the implications this work might have for Church leaders, pastors, worship leaders, musicians, liturgists and missionaries in their work of preparing music for worship across Christian denominations. / Christian Spirituality, Church History and Missiology / D. Th. (Missiology)