The announcement of appointments were made by party president Rajnath Singh here.
Jha, who has recently been given a second term for the Rajya Sabha from Madhya Pradesh, will take care of BJP's Delhi unit party affairs.
Former BJP Chief Nitin Gadkari is at present the election in charge of the Delhi unit of the party, where it missed the chance of government formation by a whisker after it emerged as the single largest party by securing 32 of the 70 assembly constituencies.
Delhi has seven Lok Sabha seats and BJP is facing the challenge of taking on the AAP, which emerged as a formidable force in the recent assembly elections.