Ingham County Jail
Ingham County Jail
County Jail / Adult Detention FacilityMailing Address
[Inmate Full Legal Name] — [Inmate Number]
c/o Mail Processing Center
P.O. Box 9175
Seminole, FL 33775-9175
c/o Mail Processing Center
P.O. Box 9175
Seminole, FL 33775-9175
Physical Address
640 N. Cedar Street, Mason, MI 48854
Phone
Governing Agency
Ingham County Sheriff's Office
Inmate ID
Inmate Number — Required
Last Verified
September 27, 2026
Facility Mailing and Service Information
Send ordinary personal mail to c/o Mail Processing Center, P.O. Box 9175, Seminole, FL 33775-9175 with the inmate's full name and inmate number. Do not send ordinary personal mail to 640 N. Cedar Street.
Source: Official sourceLast verified: September 27, 2026
Photos may be sent through the current Smart Communications/digital communication system subject to current content and fee rules. Confirm current limits before sending valuable originals.
Source: Official sourceLast verified: September 27, 2026
Do not send publications or packages to the personal-mail processing address unless the jail specifically authorizes it. Confirm current facility rules.
Source: Official sourceLast verified: September 27, 2026
Do not place cash or money orders in scanned personal mail. Use Ingham County's current approved inmate-account deposit procedure.
Source: Official sourceLast verified: September 27, 2026
Ingham County provides video and jail visitation services. Verify current custody and the current visitor-registration/scheduling rules before visiting.
Source: Official sourceLast verified: September 27, 2026
How to Address Your Letter
Ingham County Jail moved into the current Justice Complex in early 2023.
Ordinary personal inmate mail:
[Inmate Full Legal Name] — [Inmate Number]
c/o Mail Processing Center
P.O. Box 9175
Seminole, FL 33775-9175
Ordinary U.S. Mail sent to 640 N. Cedar Street is returned to sender and is not forwarded.
Legal/business mail uses:
[Inmate Full Legal Name] — [Inmate Number]
Ingham County Correctional Facility
640 N. Cedar Street
Mason, MI 48854
Ordinary personal inmate mail:
[Inmate Full Legal Name] — [Inmate Number]
c/o Mail Processing Center
P.O. Box 9175
Seminole, FL 33775-9175
Ordinary U.S. Mail sent to 640 N. Cedar Street is returned to sender and is not forwarded.
Legal/business mail uses:
[Inmate Full Legal Name] — [Inmate Number]
Ingham County Correctional Facility
640 N. Cedar Street
Mason, MI 48854
About Ingham County Jail
Ingham County Jail is the current county correctional facility in the Ingham County Justice Complex at 640 N. Cedar Street in Mason. The jail moved into the new facility in early 2023 and uses off-site digital mail processing.