Fort Dearborn

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Fort Dearborn was a United States fort built in 1803 along the Chicago River, in what is now Chicago, Illinois. It was constructed by U.S. Army troops under Captain John Whistler and named after Henry Dearborn, who was then the Secretary of War. The fort was a log building surrounded by a double wooden stockade, with two small guard towers.

In 1812, during the War of 1812, the fort was evacuated. On August 15, about 500 Potawatomi warriors attacked the marching evacuees in what became known as the Battle of Fort Dearborn. Many people were killed, and the fort was burned down the next day.

A new Fort Dearborn was built on the same site in 1816. The rebuilt fort had wooden palisades, officers’ and soldiers’ barracks, a garden, and other buildings. The garrison stayed there until 1823, and was briefly closed, then re‑garrisoned again in 1828 after renewed conflicts with Native peoples.

In 1837, the fort and much of the surrounding land were deeded to the City of Chicago. Over the years, parts of the fort disappeared when the Chicago River was widened (1855) to straighten its bend, and a fire in 1857 destroyed many buildings. The remaining structures were lost in the Great Chicago Fire of 1871.

Today the Fort Dearborn site is a Chicago Landmark, located in the Michigan–Wacker Historic District at the southern end of the DuSable Michigan Avenue Bridge. The outline of the fort is marked by plaques, and a line in the sidewalk and street shows where it once stood. Some pieces of the fort’s timber are kept at the Chicago History Museum.

The fort’s history is tied to Chicago’s early development. A French‑Canadian trader, Jean Baptiste Point du Sable, settled near the river’s mouth in the 1780s, and later settlers like the Kinzie family helped lead the growing community. In 1833, the First Presbyterian Church began in the fort’s carpentry shop, one of Chicago’s oldest institutions. A replica of Fort Dearborn was shown at the 1933 Century of Progress exhibition, and the fort was even honored on the Chicago flag with a star added in 1939. Fort Dearborn was named a Chicago Landmark in 1971, and today a school bears its name as a reminder of this early chapter in Chicago’s history.