It depends upon where the inmate is incarcerated and how long they have on their sentence. If he is awaiting transfer, the county jail will not perform a marriage but the chaplain at the state or federal facility might.
https://www.inmateaid.com/ask-the-inmate/can-an-inmate-and-marry-while-he-is-incarcerated-waiting-to-go-to-prison#answer
Accepted Answer Date Created: May 31,2016