•
Jerome Adams: served as the twentieth surgeon general of the United States from September 5, 2017, until January 20, 2021. •
Richard H. Alvey: chief justice of the Maryland Supreme Court, a federal judge in the 1870s and 1880s, born and raised in St. Marys County •
William H. Barnes:
Medal of Honor recipient for valor in the
Battle of Chaffin's Farm while serving in the Union Army during the
Civil War, was a free African American farmer from St. Mary's County •
Margaret Brent: English immigrant to the first Colony of Maryland who lived in St. Mary's City, was an early (indirect) advocate for
women's rights by asserting her own right to run an estate and vote, and was the first woman in the English North American colonies to appear before a court of the Common Law •
Leonard Calvert: leader of the first English settlers in Maryland and first governor of the Maryland Colony, lived in St. Mary's City •
Charles Calvert: 3rd Baron Baltimore (1637–1715), second long-term governor of the Maryland Colony (his Uncle
Philip Calvert also governed before him, but only very briefly), lived in St. Mary's City •
Mary Chapin Carpenter: Grammy winning folk, country, and rock singer and songwriter who composed a song about St. Mary's County and has lived in St. Mary's County at various times •
Betty Currie: personal secretary to the president of the United States (Bill Clinton), personal secretary to the director of the Peace Corps •
Norton Dodge: economist, collector of dissident Soviet era art, smuggled thousands of Soviet dissident paintings, prints and sculptures out of communist Russia over a series of visits and at great risk to his own life and amassed one of the largest collections of Soviet-era art outside the Soviet Union, taught at
St. Mary's College in
St. Mary's City •
John Dorsey: also known as Johnny Dorsey, general manager of the
Kansas City Chiefs professional football team, NCAA College Football winner, and professional football player whose pro football career was cut short due to injuries, born in
Leonardtown •
William P. Duvall, U.S. Army major general, born on
St. George Island •
Benedict Joseph Fenwick: Catholic Bishop of Boston from 1825 until his death in 1846, born in
Leonardtown •
Henry Fowler: former member of the
Maryland House of Delegates and of the
Wisconsin State Assembly •
Michael Glaser: poet, educator, literary editor, the Poet Laureate of the State of Maryland from 2004 through 2009, was awarded the Andrew White Medal for contributions to intellectual and artistic life in Maryland, taught at
St. Mary's College, and lives in St. Mary's County •
Alfred Gough: screenwriter and author of scripts for numerous Hollywood films, born and raised in
Leonardtown •
Scott Hall: professional wrestling star and professional wrestling entrepreneur, born and raised in St. Mary's County, Maryland •
Dashiell Hammett: American author of
hardboiled detective novels and short stories, was born in St. Mary's County •
James H. Harris: Medal of Honor recipient for heroism in the Battle of Chaffin's farm during the Civil War, an African American Union soldier who grew up as a free Black tenant farmer in Great Mills •
Joseph B. Hayden, Medal of Honor recipient for actions during the American Civil War on the
USS Ticonderoga, born in St. Mary's City •
Robert E. Hogaboom: four-star Marine Corps general, chair of the Historic St. Mary's City Commission and advocate for decades for the reconstruction and development of Historic St. Mary's City •
Steny Hoyer: former State Senator and
Democratic member of the
United States House of Representatives •
Louise Daniel Hutchinson: noted historian of
African American history, was born in Ridge, Maryland •
Francis Scott Key: composer of the
Star Spangled Banner, grew up in St. Mary's County •
Ted Koppel: journalist and former host of the news show
Nightline, lived in Southern St. Mary's County • William and
Dinah Nuthead: established the first printing house in the Southern Colonies at St. Mary's City, Maryland •
J. Frank Raley: State Senator and state representative, trustee of
St. Marys College of Maryland, credited for helping to establish St. Mary's College as a four-year institution and playing key roles in its development into a nationally top-ranked public college, born and raised in St. Mary's County •
Tubby Smith: college basketball coach, grew up in
Scotland, Maryland •
William C. Somerville: author, historian, diplomat, War of 1812 soldier, born and raised in St. Mary's County •
Norwood Sothoron: athlete, soldier, commandant of Charlotte Hall Military Academy, inducted into the
National Lacrosse Hall of Fame in 1972, born and raised in
Charlotte Hall, Maryland •
Sylvester Stallone: award-winning actor and director who attended Charlotte Hall Military Academy and boarding school in St. Mary's County as a teenager •
Father Andrew White: Jesuit priest and settler on first voyage to establish the new Maryland colony, one of the founders of the first Catholic mission and parish in North America, was instrumental in negotiating peace and territory deals with the
Piscataway Indian tribes in St. Marys County, lived in
St. Marys City, Maryland ==In popular culture==