The present Una district till first Gregorian calendar month. 1966 was one in all the tehsils of the Hoshiarpur district of the geographic region. sequent upon reorganization of geographic region all Capitol Hill areas together with Una tehsil was transferred to Himachal Pradesh. Ever since, till Gregorian calendar month 1972 it continued to stay as tehsil of the then Kangra district. On the first Gregorian calendar month 1972 the Himachal Pradesh Govt. Una reorganized the then Kangra district into 3 districts specifically Una, Hamirpur, and Kangra. Una district consists of 2 Sub-Divisions(Una and Amb), 3 Tehsils(Bangana, Amb, and Una) and 2 Sub-Tehsils(Harold and Bharwain) and has 5 Development Blocks(Una, Bangana, Gagret, Amb, and Harold), Himachal Pradesh .
It is believed that the current Una district, minus its Jap facet, was formally a vicinity of the erstwhile Kangra State. Click To EnlargeBulk of the current Una district that is otherwise popularly referred to as Jaswan Dun was dominated by the Katoch family of Kangra. The Jaswan State that occupied a fertile tract within the JASWAN DUN depression of the outer hills of the historical Kangra state was based by a trainee of the Katoch line a couple of.D.1170, whose name is claimed to possess been PURAB CHAND. Jaswan was the primary issue from the parent stem.