
The Great Chicago Fire was a devastating blaze that swept through Chicago in October 1871, destroying thousands of buildings and leaving many homeless. Legend attributes the fire’s start to Mrs. O’Leary’s cow kicking over a lantern in her barn, though this story is likely a myth. The fire’s true cause remains uncertain, but the tale of Mrs. O’Leary’s cow has become an enduring part of Chicago’s folklore.

The Great Chicago Fire was a devastating blaze that swept through Chicago in October 1871, destroying thousands of buildings and leaving many homeless. Legend attributes the fire’s start to Mrs. O’Leary’s cow kicking over a lantern in her barn, though this story is likely a myth. The fire’s true cause remains uncertain, but the tale of Mrs. O’Leary’s cow has become an enduring part of Chicago’s folklore.
What was The Great Chicago Fire?
A major urban fire that burned through Chicago in October 1871, destroying thousands of buildings and leaving many residents homeless.
What is the Mrs. O'Leary's cow legend?
A popular tale says Mrs. O'Leary's cow kicked over a lantern in her barn, starting the fire, but historians consider it a myth.
What is believed to be the true cause of the fire?
There’s no single proven cause; it’s thought to have been a mix of factors like sparks, dry winds, and the city’s wooden buildings, rather than a single animal’s action.
What were the consequences of the fire?
Widespread destruction and about 100,000 people left homeless; it spurred rebuilding and major urban fire-safety reforms.
When did the fire start and end?
It began on October 8, 1871, and burned for about two days, with most flames dying down by October 10.