Nahan is a town in Himachal Pradesh in India and is the headquarters of the Sirmaur District. It is also the location of the Indian Army Special Forces Training School. It was the capital of the former Sirmur princely state Rani Tal Nahan.
As of 2001 India census, Nahan tehsil had a population of 35000. Males constitute 54% of the population and females 46%. Nahan has an average literacy rate of 85%, higher than the national average of 59.5%: male literacy is 86%, and female literacy is 79%. In Nahan, 11% of the population is under 6 years of age. According to 2011 Census of India, Nahan has a population of 56000. The sex ratio was 916 females per thousand males and literacy rate stood at 83.4% with male literacy at 87.01% and female literacy at 76.71% Rani Tal Nahan.
Nahan is situated on a hill top in the Shiwalik Hills, overlooking green hills. Traditionally, saints and princes are linked with the origin of Nahan. The city was founded as in 1621 by Raja Karam Prakash. Another version recalls a saint who lived with a companion named Nahar on the site where the Nahan palace now stands. “Nahar” means ‘don’t kill’ and the town probably takes its name from an incident when a king was trying to kill a lion and the saint said Nahar, that is ‘do not kill it’. The name of the saint was Baba Banwari Das. Another version is that Nahar means Lion in Sanskrit. At the place where Nahan is, Lions were there so it was named Nahar and latter called Nahan, which is the distortion of Rani Tal Nahan