24/7 Trauma and Biohazard Cleanup in Leonardtown, MD

Leonardtown is an incorporated town in St. Mary's County, Maryland — the county seat and the only incorporated municipality in the county — governed by an elected mayor and town council, and its ZIP code is 20650.

County court was being held at John Hammond's house in the area, then called Newtown, by 1654, and in 1708 Phillip Lynes set aside 50 acres at the head of the bay, divided into 100 lots, for an official courthouse town.

The town was first named Seymour Town for Governor John Seymour and was renamed Leonard Town about twenty years later for Leonard Calvert, Maryland's first governor; it was incorporated in 1858.

The 2020 census counted 4,563 residents in Leonardtown, a jump of 55.7% from 2,930 in 2010, in 1,614 households and 1,763 housing units.

The town's rapid recent growth is credited to its proximity to Patuxent River Naval Air Station and to the Washington metropolitan area.

During the War of 1812 about 1,000 British Marines invaded the town, and during the Civil War a Union naval contingent occupied Leonardtown, searching houses for weapons and supplies bound for Virginia.

Leonardtown was a busy port and steamboat landing into the 20th century, and a floating theater docked there every year.

The waterfront Leonardtown Wharf park opened in May 2008.

The U.S. National Oyster Festival, with its national oyster-shucking championship, has been held in Leonardtown every year since 1967.

St. Andrew's Church and Tudor Hall in Leonardtown were listed on the National Register of Historic Places in 1973.