William Cost Johnson

William Cost Johnson (January 14, 1806 – April 14, 1860) was an American politician.

Johnson was born near Jefferson, Maryland, and studied law. He was admitted to the bar in 1831 and commenced practice in Jefferson. Johnson served as a member of the Maryland House of Delegates in 1831 and 1832, and was elected as an Anti-Jacksonian to the Twenty-third Congress, serving from March 4, 1833 to March 3, 1835. He was also a delegate to the State constitutional convention in 1836.

Johnson was elected as a Whig to the Twenty-fifth, Twenty-sixth, and Twenty-seventh Congresses, serving from March 4, 1837 to March 3, 1843. In Congress, he served as chairman of the Committee on the District of Columbia (Twenty-sixth Congress), and as a member of the Committee on Public Lands (Twenty-seventh Congress). After Congress, he continued the practice of his profession until his death in Washington, D.C.. He is interred in the Reformed Church Cemetery in Jefferson.


  • United States Congress. "William Cost Johnson (id: J000180)". Biographical Directory of the United States Congress.
Party political offices
Preceded by
John Nevett Steele
Whig nominee for Governor of Maryland
Succeeded by
Thomas Pratt
U.S. House of Representatives
Preceded by
Charles S. Sewall
Member of the U.S. House of Representatives
from Maryland's 6th congressional district

Succeeded by
Francis Thomas
Preceded by
George Corbin Washington
Member of the U.S. House of Representatives
from Maryland's 5th congressional district

Succeeded by
Jacob A. Preston