The territory of the present-day district comprises the territories of the erstwhile princely states of Baghal, Baghat, Kunihar, Kuthar, Mangal, Beja, Mahlog, Nalagarh and parts of Keonthal and Koti and hilly areas of the erstwhile Punjab State which were merged with Himachal Pradesh on 1 November 1966.

The district comprises five Vidhan Sabha constituencies: Arki, Nalagarh, Doon, Solan and Kasauli.

[5] There are five blocks in the district namely Solan, Kandaghat, Dharampur, Nalagarh and Kunihar.

The offices at Baddi: According to the 2011 census the district has a population of 580,320,[8] giving it a ranking of 532nd in India (out of a total of 640).

[8] Languages of Solan district (2011)[9] At the 2011 census, 39.47% of the population identified their language as Hindi, 29.70% named it Pahari, 8.92% Punjabi, 6.45% "Other" Hindi (mostly Baghliani dialect of Mahasu Pahari), 5.61% Handuri, 2.58% Baghati, 2.35% Nepali and 1.42% Bhojpuri.

It is the main occupation of the inhabitants of Solan district and about 60 per cent of people are dependent on their livelihood on agriculture and its allied activities.

Vegetables like cabbage, turnip, beans, ladyfinger, tomato, radish, chilies, garlic, etc.

(National Research Centre for Mushroom), Central Government Body is located in Solan town.

The climatic and geographical conditions of the Solan district provide the good scope for the development of the horticulture.

Even Government of Himachal Pradesh has given priority to create and improve horticulture in Solan district.

Any surplus milk and butteroil is sold in the town which offers quick returns and near stable price.

Motilal Nehru Central state library is situated on The Mall, Solan.