Jamnagar was founded by the Great Jam Rawal, who descended on the northern coast of Kathiawar in 1535 A.D. Jam Rawals father Jam Lakhaji ruled in Terabanu in Kutch.

Jamnagar is a city and a municipal corporation in Jamnagar district in the Gujarat state of India. Jamnagar is also district head quarter of Jamnagar district. The city was built up in 1920s, substantially by Maharaja Kumar Shri Ranjitsinhji, at that time Jamnagar district was known as Nawanagar. The district lies just to the south of the Gulf of Kutch. 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.

In Jamnagar, there are some tourist places like City Lake full of 75 varities of Birds, Islands full of sea shells, corals, birds, octopus, Unspoilt Beaches, both white and golden sands, Hills with temples on top, Forest with lepords, jackals, wolfs, jungle cat, blue bulls, hyena, Temples ranging from the ancient to the new, also includes a Guiness World record holder, Bird Sancturies with 200 varities of birds, Marine Sancturies with dolphins,octopus, turtles, dugong, and Marine National Park.