Area of the district is 1,724.65 square kilometres (665.89 sq mi), which makes it by area rank 4 of the districts of Tyrol, with a population of 57,734 (as of January 1, 2012) (Number 6 in Tyrol), and a population density of 33 persons per km2.

Through the Imst district there had always been an important route between Northern Italy and Germany.

During the Roman empire, there was situated the most important route over the alps in Imst District: The Via Claudia Augusta.

Around 780 the Area came to the Franconian Empire, even though only in the Intall Valley there were German-speaking people.

1269, the court Silz came to the County of Tyrol, while Imst belonged to it since the 12th century.