John Calvin supports ministries throughout the community by member participation and financial support of:

• Meals on Wheels
  
• Habitat for Humanity
• Emergency Infant Services
• Day Center for the Homeless
• Ruth G. Hardman Literacy Program
• Tulsa Metropolitan Ministries
• Goodland Youth Home & Academy (Hugo, Oklahoma)
• Center for Counseling & Education
• Activities for Presbytery
• Heifer Project International
• Jail Ministry for women incarcerated at the David L. Moss Criminal Justice Center (Monthly)
• Onsite food panrty and shower for itinerate drop-ins and those who are just down on their luck
• Narcotics Anonymos (on the premises)
• Humanitarian efforts sponsored by Kiwanis, Lions Club, Rotary International, and the United Nations Association

The congregation also supports evangelism and mission efforts in our area through Eastern Oklahoma Presbytery, nationally and worldwide through the Presbyterian Church (U.S.A.), including (1) discipleship, ministry, and spiritual development; (2) special offerings and financial giving related to Church World Service (for disaster relief and economic development); (3) local, regional, and global peace-making efforts; and, (4) promoting interfaith understanding and cooperation.