Seeds of Hope
Seeds of Hope is a community service agency supported in part by First Presbyterian Church, with offices located in the church campus.

Presbytery de Cristo
First Presbyterian Church of Casa Grande is part of Presbytery de Cristo.

Presbyterian Church (USA)
First Presbyterian Church of Casa Grande is part of the Presbyterian Church (USA).

Confessing Church Movement
First Presbyterian Church is affiliated with the Confessing Church Movement, a loose gathering of churches and individuals within the Presbyterian Church (USA) that takes a more traditional stance on key theological issues.