Mohali, officially Sahibzada Ajit Singh Nagar, is a planned city in the Mohali district in Punjab, India, which is an administrative and a commercial hub lying south-west of Chandigarh. It is the headquarters of the Mohali district and one of the six Municipal Corporations of the State. It is officially named after Sahibzada Ajit Singh, the eldest son of Guru Gobind Singh.

Mohali district, officially known as Sahibzada Ajit Singh Nagar district or SAS Nagar district, is one of the twenty three districts of Punjab, a state in north-west India. It was formed in April 2006 and is 18th district of Punjab, created next to Pathankot district. This district was carved out of areas falling in Ropar and Patiala District. It is situated next to the union territory of Chandigarh, Ambala and Panchkula districts of Haryana.