High Quality Content by WIKIPEDIA articles! Rosemont is a village in Cook County, Illinois, United States located immediately northwest of Chicago. The village was incorporated in 1956, though it had been settled long before that. While Rosemont`s land area and population are relatively small among municipalities in the Chicago Metropolitan Area, the village is a major center for commercial activity in the region and is a key component of the Golden Corridor. Numerous corporate facilities and the 78,000 square meter Donald E. Stephens Convention Center are located in Rosemont.