Clay County Jail
Clay County Jail
County Jail / Adult Detention FacilityMailing Address
[Inmate Full Legal / Booked Name] — [Inmate / Booking Number if known]
Clay County Jail
3115 W. 4th Street
Spencer, IA 51301
Clay County Jail
3115 W. 4th Street
Spencer, IA 51301
Physical Address
3115 W. 4th Street, Spencer, IA 51301
Phone
Governing Agency
Clay County Sheriff's Office
Inmate ID
Inmate / Booking Number — Not required
Last Verified
September 27, 2026
Facility Mailing and Service Information
Use the inmate's full booked/legal name and identifying number when known and include a complete sender return address.
Source: Official sourceLast verified: September 27, 2026
Confirm the facility's current photograph size, quantity and content restrictions before mailing.
Source: Official sourceLast verified: September 27, 2026
Confirm the facility's current approved publisher/vendor and package rules before ordering books, magazines, newspapers or parcels.
Source: Official sourceLast verified: September 27, 2026
Do not place cash in ordinary correspondence unless specifically authorized. Use the facility's current approved inmate-account deposit method.
Source: Official sourceLast verified: September 27, 2026
Verify current custody, visitor-registration requirements and the current visitation or video-visitation schedule before traveling.
Source: Official sourceLast verified: September 27, 2026
How to Address Your Letter
Verify the person is currently housed at Clay County Jail before mailing. Use the inmate's full booked/legal name and inmate / booking number when known. Mail to: Clay County Jail, 3115 W. 4th Street, Spencer, IA 51301. Include the sender's complete name and return address.
About Clay County Jail
Clay County Jail is the current county detention facility at 3115 W. 4th Street in Spencer.