Camp Adair had an extensive military police force responsible for maintaining order, security, and discipline both inside and around the installation. The camp had approximately 240 military policemen assigned to various duties. Their responsibilities extended beyond the boundaries of the base, with MPs stationed throughout the surrounding area, including Albany, Corvallis, Salem, and as far south as Eugene.

Military police at Camp Adair wore a distinctive uniform that set them apart from other soldiers. They wore the Army Class A uniform along with a leather duty belt, leather holster attachment, and sidearm holster. They also carried a billy club as part of their equipment while performing law enforcement duties. Their uniforms displayed a specific military police insignia patch featuring the 9th Service Command emblem in the center, identifying them as part of the command responsible for the region.

Within Camp Adair, military police were stationed at key locations such as Gate 4, the West Gate, the East Gate, the Hospital Gate, and the radio room. A desk sergeant was responsible for answering calls, coordinating MP activities, and handling soldiers brought in for offenses such as disorderly conduct, drunken behavior, and other violations.

The MP force performed a wide variety of duties, including operating patrol vehicles, guarding PX facilities, providing barracks security, and maintaining order in areas where large numbers of soldiers gathered. Military police were also stationed at the Greyhound bus station to help identify and apprehend deserters or soldiers absent without leave. They worked closely with local law enforcement agencies throughout the region to enforce military regulations and ensure the safety and discipline of both soldiers and civilians.