Penobscot County is located in the state of Maine, in the northeastern United States. It was established in 1816 and is named after the Penobscot River, which flows through the region. The county seat is Bangor, a city known for its rich history and cultural significance. The county covers an area of approximately 3,557 square miles, making it one of the largest counties in Maine. It features a mix of urban and rural landscapes, with forests, rivers, and lakes. Penobscot County is home to various recreational activities, including hiking, fishing, and camping, attracting both residents and visitors.