Located in Lakhimpur district of Assam, Digboi is the oldest oil producing region of India.
Bappapung and Hunsapung are the two major oil fields of Digboi.
Major oil fields of Gujarat are Amkleswar (largest), Cambay, Kosamba, Kalol, Mehsana, Nowgam, Dholka, Sananda, Lunej, Wavel Bakal, and Kathana.
Located about 150 km north west of Mumbai City in the Arabian Sea, Bombay High is one of the leading oil producing regions.