The Himachal Pradesh first came into being as a Centrally administered territory on April 15, 1948 by the integration of 30 erstwhile princely States. It was administered by a Chief Commissioner, aided and advised in the discharge of his functions by an Advisory Council Consisting of Nine members, three of whom represented the erstwhile princely States and Six being public representatives. In 1951, it became a part 'C' State. Vide Section 3 of Part 'C' State's Act, 1951 Himachal Pradesh was brought under a Lt.Governor. In 1954 Bilaspur, another part-C State, was merged with Himachal Pradesh.Finally it was on January 25, 1971 that a big leap forward was taken and the 'Devbhumi' Himachal Pradesh made its debut as the 18th State of the Union of India.

Different Adminstrative Units of Himachal Pradesh