Most residents of Jamnagar are Gujarati and speak Gujarati language. A small percentage speak Kachchi language which is written in the Gujarati script but is not mutually intelligible with Gujarati. Kathiawadi Language (which is a variant of Gujarati)is widely used for day to day communication.
Major communities include Dawoodi Bohras Ahirs(Yadav), Patels, Bhanushalis, Rajputs (Khavas), Mers, Jains, Oswals, Lohanas etc.
Jamnagar has many higher education institutes.
Marine National Park, the only marine sanctuary of India is near Jamnagar - on the coral reef island of Pirotan.
Jamnagar is well-known for its four marble Jain temples: Vardhman Shah's Temple, Raisi Shah's Temple, Sheth's Temple, and Vasupujya Swami's Temple. All were built between 1574 and 1622. Bala Hanuman temple in Jamnagar is also very famous and is listed in the Guinness book of world records for the continuous chanting of "Ram Dhun" since 1st August 1964.
There are ancient and archeologially important temples like : Sidhnath Mahadev Temple in Jamnagar city area, the Navlakha Temple in Ghumli, Kileshwar Temple in Barda Hills, and the ancient Sun Temple at Gop.