Cornerstone supports missions efforts in more than 130 countries of the world through the International Mission Board of the Southern Baptist Convention.  By giving to the Cooperative Program, Cornerstone supports the ongoing budget of a worldwide missions effort seeking to share the Good News of Jesus Christ with every people group, every person in the world.  Cornerstone gives 10% of all undesignated receipts to the cause of worldwide missions through the Cooperative Program. These Cooperative Program funds are used to share Jesus Christ in our state, our nation, and around the world. These funds are used to send the more than 5,100 missionaries to their fields of service, pay their yearly salary, and supply basic needs. Cornerstone also supports the Lottie Moon Christmas Offering for International Missions each Christmas season which is used to fund the ministry budget needs of the more than 5,100 missionaries sent out by Southern Baptists around the world.

Cornerstone is also involved in missions efforts in the United States and North America through the North American Mission Board (NAMB) of the Southern Baptist Convention.  Joining with over 45,000 Southern Baptist Churches across the USA, Cornerstone supports NAMB through its giving to the Cooperative Program and through a special Easter season offering known as the "Annie Armstrong Easter Offering for North American Missions."

Cornerstone seeks to reach the state of Missouri with the Good News of Jesus by supporting the Missouri Baptist Convention.   As one of nearly 2000 Missouri Baptist Churches, Cornerstone seeks to actively go to people in Missouri with the Gospel by giving, praying, and participating in missions and evangelism efforts.

Baptist Men and Woman's Missionary Union seek to galvanize both men, women, boys, and girls in the task of sharing Jesus so that every person has the opportunity to hear the Gospel and respond.  Mission Friends on Wednesday nights at 7 p.m. teaches preschoolers about Jesus and those who seek to share His love around the world.  GA's teaches elementary age girls about missions efforts seeks to involve them in the work of missions.