He was the son of Cornelius Howard and Ruth Howard, of the Maryland planter elite and was born at their plantation "The Forest." Howard grew up in an Anglican slaveholding family. Anglicanism was the established church of the Chesapeake Bay colonies. Howard joined a Baltimore lodge of Freemasons.
Following his army service, Howard held several electoral political positions: elected to the Confederation Congress in 1788; fifth Governor of Maryland for three one-year terms, from 1788 through 1791; later as State Senator from 1791 through 1795; and Presidential Elector in the new 1787 ConstitutionalElectoral College set up in the presidential Election of 1792. He declined the offer from first President George Washington in 1795 to be the second Secretary of War. He joined the newly organized Federalist Party and was elected to the 4th U.S. Congress from November 21, 1796, through 1797, by the General Assembly of Maryland to the upper chamber as United States Senator for the remainder of the term of Richard Potts, who had resigned. He was elected by the Legislature in Annapolis for a Senate term of his own in 1797, which included the 5th Congress, the 6th Congress of 1799–1801 during which he was President pro tempore, and the 7th Congress, serving until March 3, 1803. Although Howard was offered an appointment as the Secretary of War in the administration of President George Washington, he declined it. Similarly, he also later declined a 1798 commission as Brigadier General in the newly organized United States Army during the preparations for the coming naval Quasi-War with the new revolutionary French Republic. After 1803, Howard returned to Baltimore, where he avoided elected office but continued in public service and philanthropy as a leading citizen. He was elected a member of the American Antiquarian Society in 1815. In the 1816 presidential election, he received 22 electoral votes for Vice President as the running mate of Federalist Rufus King, losing to the Democratic-Republican candidates of James Monroe and Governor Daniel Tompkins. No formal Federalist nomination had been made, and it is not clear whether Howard himself, who was one of several Federalists who received electoral votes for vice president, actually wanted to run as a candidate for the office. Howard developed property in the city of Baltimore and was active in city planning. His house was constructed near the city, where he owned slaves.
Marriage and family
John Eager Howard married Margaret Chew, daughter of the Pennsylvania justice Benjamin Chew, in 1787.
John Eager Howard Jr. m.1820 Cornelia Read Maryland State Senator. Died in Mercersburg, Pennsylvania, October 1822.
George Howard, m.1811 Prudence Ridgely. George was born while Col. Howard was governor in Jennings House and became governor in 1831. His home "Waverly" at Marriottsville, Maryland still exists.
Howard County, Maryland, formed out of western Anne Arundel County and southeastern Frederick County in 1839 as the Howard District and officially as Howard County in 1851, was named for him.
In 1904, the city commissioned an equestrian statue of Howard by the eminent French sculptor Emmanuel Frémiet and installed it at Washington Monument circle facing north from the north park of the circle up North Charles Street, Baltimore.
Howard is one of several notable men of Maryland mentioned in the state song "Maryland, My Maryland" written in 1861 by James Ryder Randall; the phrase "Howard's war-like thrust" refers to him.
Three streets in Baltimore share his name: the diagonal-running John Street in the Bolton Hill area; the east–west running Eager Street; and the north–south running Howard Street.