The Shasta County Marshal's Office provides transportation of inmates from the Shasta County Jail to the main courthouse for arraignments, preliminary hearings, trials and other court related functions. Juvenile inmates who are tried as adults are also transported from Juvenile Hall to the main courthouse as needed. Occasionally, this office will transport inmates from another county to the Shasta County courthouse, if the inmate has judicial business here that cannot wait until his or her release from custody.

The transportation of inmates by the Shasta County Marshal's Office is done through an agreement with the Shasta County Sheriff's Office, who has ultimate authority over and responsibility for all adult inmates in the county. This agreement, unique among counties, allows for seamless transportation of inmates from jail cell to courtroom, leaving deputies of the Sheriff's Office free to perform other essential duties.