As of 2001[update] India census, Guru Har Sahai had a population of 14,528. Males constitute 53% of the population and females 47%. Guru Har Sahai has an average literacy rate of 61%, higher than the national average of 59.5%: male literacy is 65%, and female literacy is 57%. In Guru Har Sahai, 13% of the population is under 6 years of age.
Guruharsahai is a village and is thus represented by a Municipality system of governance. A Municipality is the smallest administrative subdivision where each village is responsible for its own affairs, as the foundation of India's political system. The village is represented by a MLA Rana Gurmeet Singh Sodhi (Congress party, UPA), who is related to family of the Sodhi gurus.