 The St. Mary's Sheriff's Office is one of the oldest documented sheriff's offices in the United States, starting with James Baldridge in 1637.As the county was established in 1634 along with Virginia's first eight counties, there most likely was a sheriff appointed at that time, however no documentation has been found prior to 1637.Sheriffs in St. Mary's County have been determined by election since 1776. , the current Sheriff is Timothy Cameron with 132 deputy sheriffs.