Khattar belongs to a Khatri family.Khattar was born in 1954 in Nindana village of Meham Chobisi, tehsil in Rohtak district of Haryana. His father, Harbans Lal Khattar, was of the Arora caste, who migrated to Haryana from Jhang district of Pakistan following the Partition of India in 1947. His family initially settled in the Banyani village of Rohtak district and took up farming.