The Nyköping River is a river located in Sweden, flowing through the town of Nyköping in Södermanland County. It stretches approximately 30 kilometers and empties into the Baltic Sea. The river is known for its scenic beauty and is surrounded by lush greenery, making it a popular spot for outdoor activities. Historically, the Nyköping River has played a significant role in the development of the town. It has been used for transportation and trade, contributing to the local economy. Today, the river is also a habitat for various wildlife species, enhancing the area's biodiversity.