The patrol bureau is responsible for the protection of lives and property in all of unincorporated Harris County. The patrol bureau has grown rapidly under the administration of Sheriff Thomas. A change in philosophy, away from random, reactive patrols, toward vigorously proactive and cutting-edge community based law enforcement techniques has been accompanied by the aquisition of greater resources with which to combat crime. The bureau has more than doubled the number of deputies on the streets since 1995. Patrol operations place greater emphasis than ever before on saturation (Zero Tolerance) operations, uniformed interdiction teams, K-9 units, and other enforcement specialties.

North District (I) serves North Harris County from its headquarters at 6831 Cypresswood Drive.

East District (II) serves Northeast Harris County from its headquarters at 7900 Will Clayton Parkway in Humble.

South District (III) serves east / southeast Harris County from headquarters at 14350 Wallisville Road.

West District (IV) serves west / southwest Harris County from headquarters at 16715 Clay Road.

Northwest District (V) serves northwest Harris County from headquarters at 23828 FM 249

A patrol deputy is responsible for investigating all types of criminal activity, making required comprehensive reports and filing appropriate charges in an attempt to deter criminal activity. They also apprehend violators and target potential hazardous activities and areas for enhanced enforcement efforts. Patrol deputies respond to and investigate traffic accidents and issue citations in an attempt to make our roadways safer for the public.