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. 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.

Kumar Shri RanjitsinhjiJamnagar, historically called Nawanagar or the new city, was one of the most important princely states of saurashtra. The Jamnagar district, originally constituted as Halar district, is not only recent in its origin but also in its modern set up. But the region comprised therein is of great antiquity and dates back to ancient periods of Jamnagar. According to Pauranik literature, Lord Krishna established his kingdom at Dwarka, now in Jamnagar district, after his migration from Mathura and it is to this great Yadava race that the Jams of Nawanagar trace their descent.

The founder of the princely state of Jamnagar was the Jam Rawal, who descended on the northern coast of Kathiawar in 1535 A.D. Jam Rawal's father Jam Lakhaji ruled in Terabanu in Kutch.

Jamnagar is located at 22.47° N 70.07° E It has an average elevation of 20 metres (65 ft). Jamnagar has a lake called Lakhota lake which is very popular among local Jamnagar residents.

Jamnagar contains several ancient and archeologially important temples, such as Sidhnath Mahadev Temple in Jamnagar city area, the Navlakha Temple in Ghumli, Kileshwar Temple in Barda Hills, The Ancient Sun Temple at Gop and The Ancient Bhid Bhanjan Temple built by the Jams. Bala Hanuman is highly venerated among the devotees of Rama. The Bala Hanuman Temple is noted for the continuous chanting of the mantra "Jai Ram, Jai Ram, Jai Jai Ram". Started on August 1, 1964, the chant continues for 24 hours a day, in shifts, and is still continuing. This has earned the temple a place in the Guinness Book of World Records.

There are many Shiv Temples within the city, such as Badri kedar Nath and Nilkanth Mahadev Temle around the Town Hall and the Kashi Vishwanath Temple on the K.V. Road.

Bus
ST buses go hourly to Rajkot and every 30 minutes to Junagadh; other buses go to Dwarka, Porbandar, Bhuj and Ahmedabad and other places of Gujarat. There are various private bus companies having modern buses in good condition and which are air conditioned.

By Rail
Jamnagar Railway Station is well connected with Mumbai, Ahmedabad, Delhi, Calcutta and other important cities of India through regular trains.

By Air
Jamnagar Airport is 10 km from the city center. Jamnagar is connected to Mumbai by 2 flights daily, from Indian Airlines and Air Deccan.

By Rail
Jamnagar Railway, situated between Rajkot and Porbandar, is managed by the Western Railways. It is well connected with Mumbai, Ahmedabad, Delhi, Calcutta,Gorakhpur,Varanasi and other important cities of India through regular trains. There are direct trains from Mumbai and Ahmedabad via Rajkot. Dwaraka Express, Mumbai-Porbandar Saurashtra Express, Puri-Okha Express, Porbandar-Howrah Express and Saurashtra Janata Express pass through this station.

Road
Jamnagar has a well-established road link to various cities of Gujarat like Rajkot, Porbundar, Junagadh, Bhuj, Bhavnagar, Ahmedabad, Baroda and Surat. Jamnagar is 308 km from Ahmedabad. There are STC buses to Rajkot every 30 minutes and other departures to Dwarka, Porbander, Bhuj, Junagadh and Ahmedabad.