Calvert County Detention Center
Calvert County Detention Center
County Detention CenterMailing Address
[Inmate Full Legal / Booked Name] — [Inmate ID if known]
Calvert County Detention Center
P.O. Box 9, Barstow, MD 20610
Calvert County Detention Center
P.O. Box 9, Barstow, MD 20610
Physical Address
325 Stafford Road, Barstow, MD 20610
Governing Agency
Calvert County Sheriff's Office
Inmate ID
Inmate / Booking Number — Not required
Last Verified
September 27, 2026
Facility Mailing and Service Information
Verify the person is currently housed at Calvert County Detention Center before mailing. Use the inmate's full legal/booked name and ID when known. Mail to P.O. Box 9, Barstow, MD 20610 and include a complete sender return address.
Last verified: September 27, 2026
Confirm current photo size, quantity and content rules before mailing.
Last verified: September 27, 2026
Confirm current direct-publisher/vendor rules before ordering books or periodicals.
Last verified: September 27, 2026
Use the facility's approved inmate-account deposit procedure.
Last verified: September 27, 2026
Verify current custody/placement, visitor approval requirements and current visitation rules before traveling.
Last verified: September 27, 2026
How to Address Your Letter
Verify the person is currently housed at Calvert County Detention Center before mailing. Use the inmate's full legal/booked name and ID when known. Mail to P.O. Box 9, Barstow, MD 20610 and include a complete sender return address.
About Calvert County Detention Center
Calvert County Detention Center is a Maryland county, juvenile, corrections or auxiliary facility record reviewed for current status and mail routing on 2026-09-27.