The FBI's Uniform Crime Reporting program lists 3 law enforcement agencies in St. Mary's County, Maryland: the county sheriff's office, 1 state police post and 1 campus police department.
Sheriff's Office and County Police in St. Mary's County
State Police in St. Mary's County
College and University Police in St. Mary's County
Where People Arrested in St. Mary's County Are Held
In most U.S. counties, adults arrested by city police, the sheriff or state troopers are booked into the county jail first. Some larger cities run their own holding jail, so if a person is not on the county roster, call the arresting department.
Law Enforcement in Other Maryland Counties
Agency names, types and ORI codes come from the FBI Crime Data Explorer agency list, retrieved November 2026. NIBRS dates show when an agency began reporting incident-level crime data to the FBI.