John Campbell was a United States Representative from Maryland

Maryland

Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...

. Born near Port Tobacco, he studied law and was admitted to the bar

Bar (law)

Bar in a legal context has three possible meanings: the division of a courtroom between its working and public areas; the process of qualifying to practice law; and the legal profession.-Courtroom division:...

 and practiced. He held several local offices and was a member of the Maryland State Senate

Maryland State Senate

The Maryland Senate, sometimes referred to as the Maryland State Senate, is the upper house of the General Assembly, the state legislature of the U.S. state of Maryland...

 for three years.

Campbell was elected as a Federalist

Federalist Party (United States)

The Federalist Party was the first American political party, from the early 1790s to 1816, the era of the First Party System, with remnants lasting into the 1820s. The Federalists controlled the federal government until 1801...

 to the Seventh and to the four succeeding Congresses, serving from March 4, 1801 to March 3, 1811. He was judge of the orphans’ court of Charles County

Charles County, Maryland

Charles County is a county in the south central portion of the U.S. state of Maryland.As of 2010, the population was 146,551. Its county seat is La Plata. This county was named for Charles Calvert , third Baron Baltimore....

. He died at "Charleston" farm, in Charles County; interment was in the private burying ground on the estate of Daniel Jenifer.