Sirmur (also spelled as Sirmor, Sirmaur, Sirmour,or Sirmoor) was an independent kingdom in India, founded in 1616, located in the region that is now the Sirmaur district of Himachal Pradesh. The state was also known as Nahan, after its main city, Nahan. Sirmur was ruled by the chiefs of Rajput lineage, who used the title 'Raja' later 'Maharaja' granted by the British. The Rajputs of Sirmur were fierce warriors who maintained their independence before becoming a protectorate of British India. The state ranked predominant amongst the Punjab hill States. It had an area of 1198 square miles and a revenue of 300,000 rupees in 1891.