Jamnagar is a city and a municipal corporation in Jamnagar district in the Indian state of Gujarat. The city was built up substantially by Maharaja Kumar Shri Ranjitsinhji in the 1920s, when the district was known as Nawanagar. The district lies just to the south of the Gulf of Kutch and is 337 km south west of state capital, Gandhinagar. Jamnagar has shot to prominence as Reliance Industries, India's largest private company, established the world's largest refinery near Moti Khavdi village. It is also home to Essar Oil, another important oil refinery of India, Essar Oil Refinery, Vadinar.

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