Jefferson County Jail
Jefferson County Jail
County Jail / Adult Detention FacilityMailing Address
[Inmate Full Legal / Booked Name] — [Inmate ID if known]
Jefferson County Jail
1360 Walnut Street, Oskaloosa, KS 66066
Jefferson County Jail
1360 Walnut Street, Oskaloosa, KS 66066
Physical Address
1360 Walnut Street, Oskaloosa, KS 66066
Governing Agency
Jefferson 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 Jefferson County Jail before mailing. Use the inmate's full legal/booked name and inmate ID when known. Mail to Jefferson County Jail, 1360 Walnut Street, Oskaloosa, KS 66066. Include a complete sender return address.
Last verified: September 27, 2026
Confirm current photograph size, quantity and content restrictions before mailing. Do not send irreplaceable originals.
Last verified: September 27, 2026
Confirm current approved publisher/vendor and package rules before ordering books, magazines or newspapers.
Last verified: September 27, 2026
Do not enclose cash unless specifically authorized. Use the facility's current approved inmate-account deposit method.
Last verified: September 27, 2026
Verify current custody, visitor approval requirements and the current visitation or video-visitation schedule before traveling.
Last verified: September 27, 2026
How to Address Your Letter
Verify the person is currently housed at Jefferson County Jail before mailing. Use the inmate's full legal/booked name and inmate ID when known. Mail to Jefferson County Jail, 1360 Walnut Street, Oskaloosa, KS 66066. Include a complete sender return address.
About Jefferson County Jail
Jefferson County Jail is a Kansas detention/corrections record reviewed for current mailing and facility status on 2026-09-27.