The territory on which Granby is found was described as natural prairies and forests composed of ash, fir, maple, hemlock and birch, there was also a small swamp a kilometre and half uphill.
The area was inhabited sporadically by nomadic First Nations.

In 1792, Loyalists were granted permission to colonize the Eastern Townships.
 On January 29, 1803, the Executive Council of Quebec conceded the Township of Granby to Colonel Henry Caldwell and his 97 associates.
John Horner, the first inhabitant who settled on the site of the current town arrived in 1813.
Horner built a sawmill near the Yamaska River.
Twelve years later, in 1825, he opened a general store with Richard Frost.
Frost traced the official plans later that same year.

Granby became an incorporated municipality in 1816, and a town in 1971.

Field areas have been exploited for agricultural use and the North Yamaska river's flow has been used for its hydraulic energy since the construction of a first dam in 1815 by large industrial companies; the use of dams along the stream has provoked the formation of a large shallow swamp, called Lac Boivin, often cited as one of Granby's landmarks.

In May 2006, the citizens of Granby and Granby Township held a referendum on a possible merger.
A majority of citizens of the two municipalities approved the merger, which took effect on January 1, 2007.
The territory on which Granby is found was described as natural prairies and forests composed of ash, fir, maple, hemlock and birch, there was also a small swamp a kilometre and half uphill. The area was inhabited sporadically by nomadic First Nations.
In 1792, Loyalists were granted permission to colonize the Eastern Townships.  On January 29, 1803, the Executive Council of Quebec conceded the Township of Granby to Colonel Henry Caldwell and his 97 associates. John Horner, the first inhabitant who settled on the site of the current town arrived in 1813. Horner built a sawmill near the Yamaska River. Twelve years later, in 1825, he opened a general store with Richard Frost. Frost traced the official plans later that same year.
Granby became an incorporated municipality in 1816, and a town in 1971.
Field areas have been exploited for agricultural use and the North Yamaska river's flow has been used for its hydraulic energy since the construction of a first dam in 1815 by large industrial companies; the use of dams along the stream has provoked the formation of a large shallow swamp, called Lac Boivin, often cited as one of Granby's landmarks.
In May 2006, the citizens of Granby and Granby Township held a referendum on a possible merger. A majority of citizens of the two municipalities approved the merger, which took effect on January 1, 2007.
Granby, Quebec