The province of Varese is a province in the Lombardy region of Italy. Its capital is the city of Varese, but its largest city is Busto Arsizio. The headquarters of AgustaWestland, the company merged into Leonardo since 2016 and the world's largest producer of helicopters, is based in Samarate, a comune (municipality) of the province. As of 2015, it has a population of 889,410 inhabitants over an area of 1,198.11 square kilometres (462.59 sq mi). The province contains 139 comuni.

Lombardy is an administrative region of Italy that covers 23,844 km2 (9,206 sq mi); it is located in northern Italy and has a population of about 10 million people, constituting more than one-sixth of Italy's population. Lombardy is located between the Alps mountain range and tributaries of the river Po, and includes Milan, its capital, the largest metropolitan area in the country, and among the largest in the EU.