Kalsia was a princely state in Punjab, British India, one of the former Cis-Sutlej states. It was founded by Gurbaksh Singh Kalsia in 1760. After India's independence, it was included in PEPSU and later in the Indian East Punjab after the States Reorganisation Act, 1956. The area of Kalsia is now located in the modern day Indian states of Punjab and Haryana. In 1940 the population of Kalsia was 67,393. Kalsia was ruled by Jat Sikhs.