Khattar is also the fifth non-Jat Chief Minister of the state and the first in last 18 years.
Six cabinet ministers, including a woman MLA Kavita Jain (Sonipat), and three Ministers of State (Independent Charge) were also sworn in at the event attended by a large number of people.
The five other Cabinet ministers sworn in are Haryana BJP President Ram Bilas Sharma (MLA from Mahendargarh), Abhimanyu (Narnaund), Om Parkash Dhankar (Badli), Anil Vij (Ambala Cantt) and Narbir Singh (Badshahpur).
Three Ministers of State (Independent Charge) – Vikram Singh Thekedar (Kosli), Krishan Kumar Bedi (Shahabad SC) and Karan Dev Kamboj (Indri) - were also sworn in.