Mr Jha was Additional Director General of Police (Law and Order) prior to his current appointment. The 53-year-old officer replaces SK Saikia, who retired today.
"Jha is the new Ahmedabad Police Commissioner. He will assume charge tomorrow," in-charge DGP Pramod Kumar said.
The 1983-batch officer was member of the Special Investigation Team constituted by the Supreme Court to probe the 2002 riots in Gujarat.