William Gwynn (attorney)

William Gwynn
Portrait of Baltimore attorney William Gwynn (c. 1840)
Born1775
DiedAugust 14, 1854(1854-08-14) (aged 78–79)
Harford County, Maryland, U.S.
OccupationLawyer · newspaper editor
OrganizationsHibernian Society of Baltimore (vice‑president, 1803)
Delphian Club (president, 1824–1825)
Known forEditor‑proprietor of the Federal Gazette and Baltimore Daily Advertiser

William Gwynn (1775 – August 14, 1854) was an Irish‑born American lawyer, newspaper editor, and civic leader based in Baltimore, Maryland. He owned and edited the Federal Gazette and Baltimore Daily Advertiser—often called the Baltimore Gazette—for more than two decades, co‑founded the Hibernian Society of Baltimore, and argued a transportation case for the Baltimore and Ohio Railroad (B&O).