Sirmaur, also known as Sirmour, is a district located in the state of Himachal Pradesh, India. It is situated in the southeastern part of the state and is known for its scenic beauty and rich cultural heritage. The district headquarters of Sirmaur is Nahan, which is a major town and a popular tourist destination.
Sirmaur district is surrounded by the districts of Shimla, Solan, and Uttarakhand. The district is predominantly hilly, with the Shivalik range of the Himalayas running through it. The landscape is characterized by lush green valleys, forests, and rivers, making it an attractive destination for nature lovers and adventure enthusiasts.