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The Boston Port Act was an Act of the Parliament of Great Britain[1] which became law on March 31, 1774, and took effect on June 1, 1774.[2] It was one of five measures (variously called the Intolerable Acts, the Punitive Acts or the Coercive Acts) that were enacted during the spring of 1774 to punish Boston for the Boston Tea Party.[3]

Trade Act of 1774
Long titleAn act to discontinue, in such manner, and for such time as are therein mentioned, the landing and discharging, shipping of goods, wares, and merchandise, at the town, and within the harbour, of Boston, in the province of Massachusetts Bay, in North America.
Citation14 Geo. III. c. 19
Territorial extentProvince of Massachusetts Bay
Royal assentMarch 20, 1774
CommencementJune 1, 1774
Other legislation
Relates toIntolerable Acts
Status: Repealed


The Act was a response to the Boston Tea Party. King George III's speech of 7 March 1774 charged the colonists with attempting to injure British commerce and subvert the Constitution, and on the 18th Lord North brought in the Port Bill. It outlawed the use of the Port of Boston (by setting up a barricade/blockade) for "landing and discharging, loading or shipping, of goods, wares, and merchandise" until such time as restitution was made to the King's treasury (for customs duty lost) and to the East India Company for damages suffered. In other words, it closed Boston Port to all ships, no matter what business the ship had. It also provided that Massachusetts Colony's seat of government should be moved to Salem and Marblehead made a port of entry. The Act was to take effect on June 1.[4]

Even some of the strongest allies of America in Parliament at first approved the Act as moderate and reasonable, arguing that the town could end the punishment at any time by paying for the merchandise destroyed in the riot and allowing law and order to have their course. But the Whig opposition soon collected itself, and the bill was fought in its various stages by Edmund Burke, Isaac Barré, Thomas Pownall and others. In spite of them, the Act became a law 31 March, without a division in the Commons and by unanimous vote in the Lords.[4]

Royal Navy warships subsequently began patrols at the mouth of Boston Harbor to enforce the acts. The British Army also joined in enforcing the blockade, and Boston was filled with troops, Thomas Gage, commander-in-chief.[4] Colonists protested that the Port Act penalized thousands of residents and violated their rights as subjects of George III.[2]

As the Port of Boston was a major source of supplies for the citizens of Massachusetts, sympathetic colonies as far away as South Carolina sent relief supplies to the settlers of Massachusetts Bay. So great was the response, that the Boston leaders boasted that the town would become the chief grain port of America if the act were not repealed.[4] June 1 was widely observed as a day of fasting and prayer, bells being tolled, flags placed at half-mast, and houses draped in mourning.[5] This was the first step in the unification of the thirteen colonies, which now had a cause for which to work together. The First Continental Congress was convened in Philadelphia on September 5, 1774, to coordinate a colonial response to the Port Act and the other Coercive Acts.[6]


  1. ^ 14 Geo. III. c. 19
  2. ^ a b Fremont-Barnes, Gregory, ed. (2007). "Boston Port Act (1774)". Encyclopedia of the Age of Political Revolutions and New Ideologies, 1760-1815. Greenwood Publishing Group. pp. 84–85. ISBN 9780313049514.
  3. ^ Ciment, James (2016). Colonial America: An Encyclopedia of Social, Political, Cultural, and Economic History. Routledge. p. 684. ISBN 9781317474166.
  4. ^ a b c d   One or more of the preceding sentences incorporates text from a publication now in the public domainRines, George Edwin, ed. (1920). "Boston Port Bill" . Encyclopedia Americana.
  5. ^   Gilman, D. C.; Peck, H. T.; Colby, F. M., eds. (1905). "Boston Port Bill" . New International Encyclopedia (1st ed.). New York: Dodd, Mead.
  6. ^ Ciment (2016), p. 684.

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