The first oil refinery in India was set up at
- Digboi (Assam) is oldest and first refinery in India. Whose production began in the early 20th century or at the end of the 19th century.
- Barauni (Bihar) is the second refinery in India which began in mid-20th (july 1964).
- Vishakhapatnam (Andhra Pradesh) refinery and Mumbai (Maharastra) Refinery had started operation after 1970.