Nemaha County is located in the northeastern part of the state of Kansas, USA. It was established in 1855 and is named after the Nemaha River, which flows through the area. The county seat is Seneca, which serves as the main hub for local government and services. The county covers an area of approximately 1,200 square miles and is known for its agricultural activities, including farming and livestock production. Nemaha County is home to several parks and recreational areas, providing opportunities for outdoor activities such as hiking, fishing, and camping.