He attended the Episcopal Academy and then attended the University of Pennsylvania with future naval heroes Richard Somers and Charles Stewart. His father was also a Naval officer, having commanded several ships. Another Stephen Decatur (1815–76) claimed to be his nephew and was an incorporator of Decatur, Nebraska.He married Susan Wheeler, the daughter of the Mayor of Norfolk, Virginia, on March 8, 1806.
Given command of the brig Argus in 1803, he took it to the Mediterranean for service in the First Barbary War against Tripoli. Once in the combat zone, Lieutenant Decatur commanded the schooner Enterprise and, on 23 December 1803, captured the enemy ketch Mastico. That vessel, taken into the U.S. Navy under the name Intrepid, was used by Decatur on 16 February 1804 to execute a night raid into Tripoli harbor to destroy the former U.S. frigate Philadelphia, which had been captured after running aground at the end of October 1803. Admiral Lord Nelson is said to have called this "the most bold and daring act of the age".
This daring and extremely successful operation made Lieutenant Decatur an immediate national hero, a status that was enhanced by his courageous conduct during the 3 August 1804 bombardment of Tripoli. In that action, he led his men in hand-to-hand fighting while boarding and capturing an enemy gunboat. Decatur was subsequently promoted to the rank of captain, and over the next eight years had command of several frigates.
In 1810, the Macedonian and the United States had been berthed next to one another in port at Norfolk, Virginia. The British captain John Carden wagered a beaver hat that if the two ever met in battle, the Macedonian would emerge victorious. However, the engagement in a heavy swell proved otherwise as the United States pounded the Macedonian into a dismasted wreck from long range. The Macedonian had no option but surrender, and thus was taken as a prize by Decatur. Eager to present the nation with a prize, Decatur spent a fortnight refitting the captured British frigate so as to make it able to travel back across the Atlantic.
After repairs, United States—accompanied by USS Macedonian and the brig Hornet—sailed from New York on 24 May 1813. On 1 June, the three vessels were driven into New London, Connecticut, by a powerful British squadron, and United States and Macedonian were kept blocked there until the end of the war.
Decatur attempted to sneak out of New London harbor at night in an effort to elude the British blockading squadron. While attempting to leave the Thames River Decatur saw blue lights burning near the mouth of the river in sight of the British blockaders. Convinced that these were signals to betray his plans he abandoned the project. Suspicion was directed against the "peace men" and the odious epithet of "Bluelight Federalists" long was applied to extreme Federalists. In the spring of 1814, Decatur transferred his commodore's pennant to the President (44), flagship of his new squadron consisting of Hornet (20), Peacock (22), and Tom Bowline'' (12). However, the British had established a strict blockade in the squadron's port of New York, therefore restricting any cruises.
In January 1815, Decatur's squadron was assigned a mission in the East Indies. Shortly thereafter, Decatur attempted to break through the blockade alone in the President and make for the appointed rendezvous at Tristan da Cunha. On January 15, a day after setting sail from New York, he encountered the British West Indies Squadron comprised of Razee HMS Majestic (56 guns, Captain John Hayes) and the frigates HMS Endymion (40 guns, Captain Henry Hope), HMS Pomone (38 guns, Captain John Richard Lumley) and HMS Tenedos (38 guns, Captain Hyde Parker). After the President was accidentally run aground, Decatur continued to attempt to evade his pursuers. Endymion was the first to come up and after a fierce fight, he managed to disable the British frigate. But due to the damage sustained from Endymion, Decatur's frigate was finally overhauled by Pomone and Tenedos, causing him to surrender his command. However, his hail of surrender was not heard by Pomone, firing two broadsides into the President until she hauled down a light to signify surrender. As Decatur himself termed it, "my ship crippled, and more than a four-fold force opposed to me, without a chance of escape left, I deemed it my duty to surrender". Decatur's command suffered 24 men killed and 55 wounded, including Decatur himself who was wounded by a large flying splinter.
Decatur and his men were transported as prisoners to Bermuda until February 1815. On February 8, with news of the cessation of hostilities, Decatur traveled aboard HMS Narcissus (32), landing in New London, Connecticut. On February 26, Decatur arrived in New York City, where he convalesced in a boarding house.
Capturing the Algerian fleet flagship Mashouda as well as the Algerian brig Estedio in route to Algeria, Decatur secured an amount of levying power with which to bargain with the Dey of Algiers. Upon arrival, Decatur exhibited an early use of Gunboat Diplomacy on behalf of American interests. A new treaty was agreed to within 48 hours of his arrival, confirming the success of his objectives.
After resolving the disputes in Algiers, Decatur sailed his squadron to Tunis and Tripoli to demand reimbursement for proceeds withheld by those governments in the War of 1812. In a similar fashion, Decatur received all of the demands he asked of them, and promptly sailed home victorious.
For this campaign, he became known as "the Conqueror of the Barbary Pirates".
Between 1816 and 1820, Decatur served as a Navy Commissioner. During his tenure as a Commissioner, Decatur became active in the Washington social scene. At one of his social gatherings, Decatur uttered an after-dinner toast that would become famous: "Our Country! In her intercourse with foreign nations may she always be in the right; but right or wrong, our country!" This toast is often misquoted as "My country, right or wrong!" and then attacked as a straw man by those who believe it to be an enduring and official statement of US foreign policy.
In 1818, in Washington, D.C., he built a house designed by Benjamin Henry Latrobe. The Decatur House, now a museum, was located on President's Square (Lafayette Square).
Barron's second was Captain Jesse Elliott, known for his antagonism to Decatur. Decatur asked his supposed friend Commodore William Bainbridge to be his second, to which Bainbridge consented. However, Decatur unknowingly had selected a man who had harbored a long-standing jealousy of Decatur.
The two officers fought at Bladensburg Duelling Field in Bladensburg, Maryland (now in Colmar Manor, Maryland), on 22 March 1820. Before the duel, Barron spoke to Decatur in words of suggestive conciliation, but the seconds did nothing to halt the altercation. Decatur, an expert marksman with a pistol, intended only to wound Barron. However, Decatur was mortally wounded by a shot in the abdomen. (Decatur had likewise inflicted a severe, though not mortal, wound to Barron's hip.) As Decatur lay slowly dying in his home on Lafayette Square, he is said to have cried out, "I did not know that any man could suffer such pain!" He died childless. Though he left his widow $75,000, a considerable sum in 1820 ($1,003,386 in 2007 dollars), she died penniless in 1860.
As he lay dying at his home in Lafayette Square, there was a party at his house honoring the recent marriage of First Daughter Maria Hester Monroe and White House staffer, and her first cousin Samuel L. Gouverneur. This was the first White House wedding.
Decatur's funeral was attended by the Washington political elite, including the President and Supreme Court, as well as most of Congress. More than 10,000 citizens of Washington attended to pay respects to a national hero.
His remains were temporarily deposited in the tomb of Joel Barlow at Washington, but later removed to Philadelphia, where he was interred at St. Peter's Church.
Five U.S. Navy ships have been named USS Decatur in his honor, along with numerous locations. Numerous schools also bear his name.
An engraved portrait of Decatur appears on U.S. paper money on series 1886 $20 silver certificates.
His home in Washington, D.C. is a museum owned by the National Trust.
Forty-six communities in the United States have been named after Stephen Decatur, including:
3 schools in Maryland have been named after him:
1 school overseas has been named after him:
Maryland Route 611, a road connecting U.S. Route 50 to Assateague Island in Worcester County, Maryland, is named the Stephen Decatur Highway in his honor.