Södermanland County is located in eastern Sweden, bordered by Lake Mälaren to the west and the Baltic Sea to the east. It is known for its picturesque landscapes, including forests, lakes, and charming villages. The county seat is Nyköping, which serves as a cultural and economic hub. The region has a rich history, with many historical sites, including castles and ancient ruins. Södermanland is also home to several nature reserves, making it a popular destination for outdoor activities like hiking and fishing. The county's economy is diverse, with agriculture, manufacturing, and tourism playing significant roles.