Jam Shree Digvijaysinghji was the first Raj Pramukh of the former Saurashtra State formed after independence. Jam Shree Digvijaysinghji took a very active part in the integration of princely States of Saurashtra and helped Sardar Vallabhbhai Patel in his difficult task of integration of Political States. The first Chief Minister of Saurashtra and once Congress President Shri U.N. Dhebar also hailed from Khambhalia town of his district.

The district of Jamnagar was first formed after independence in the year 1949 out of the territories of the former states of Navanagar, Dhrol, Dhrafa, Thana and parts of Jalia Devani at the time of merger with the Indian Union, the north-west part of Jamnagar District known as Okhamandal Taluka was formerly a part of Amreli District but was subsequently included in this district in 1959. The district became a part of bigger bilingual State of Bombay of 1st November, 1956 and thereafter became part of Gujarat State on 1 st May, 1960 on the formation of Gujarat State.

Darbargadh was built as fortified settlement and part of this fortification exists in western periphery. The temple of Ashapura is stated to be of the original times, built by Jam Raval. The temple now is opened up on the main street for public worship.

The oldest description of the city is available in a Sanskrit Poem “Jam Vijay” of A.D. 1582-83 attributed to Veninath. It is described with a town with a lake. The Lake which dates back to 16th century was restructured and renamed Ranmal Lake in A.D.1820 to 1852 by Jam Ranmal II.

1514 to 1562 : Construction of Darbar Gadh Palace, Mota Ashapura Temple and Ranmal Tank now cold Lakhota Tank were undertaken during the period. Residential establishments such as "Vajir Fali" and "Sheth Fali" where also developed in this period.

1570 to 1617 : During this era, Muslim Community settled in the vicinity of Kalawad Gate. Around 3000 persons belonging to Oswal Community settled in the city during the rule of Jam Sataji. Construction of Adinath temple was undertaken during this era.

1617 to 1663 : The important addition to the city was the defense wall around the city which was built by Meraman Khawas between 1661 and 1663. This wall had five gates viz. Bedi gate, Three gate, Dhunvav gate, Kalawad gate and Khambhalia gate.

1852 to 1895 : During the rule of Jam Shri Vibhaji, Lal Bungalow on the bank of Ranmal Tank, Mandvi Tower, Pancheswar Tower, Kashi Vishwanath Temple, Jumma-Masjid, Ratanbai Masjid, Nawanagar High School, Vibhaji School, City Jubilee Bag and Bungalow, Bedi Port etc. were constructed. In addition to the above, Pancheswar Road, Moti Ashapura Road, Lal Bungalow Road, and Darbar gadh were also constructed. The vital roads leading to Bedi port and Bedi gate, road from Lal Bungalow to Dhunvav and the Rozi Road were also constructed during the era.

1907 to 1933 : This era relates to the period of Jam Shri Ranjitsinhji. During his rule, the construction of valuable buildings like Pratap Vilas Place, Vibha Vilas Place, Irwin Hospital (now known as Guru Govindsinh Hospital), Solarium House, Sajuba Girls' School, Vegetable & Fruit Market, Grain market, Cloth market, Secretariat, Bedi port & Port Office, Cricket Bungalow, Ranjit Sagar Dam, Summair Club, Jamnagar Railway Station, Parsi Agiari and Anandabava Ashram etc. has been done.

And Roads like Ranjit Road, Nani Ashapura Road, Rajendra Road, Khambhaliya Gate Road, Willingdon Crescent Road, Burdhan Chowk Road, Jam Bungalow Road, Road on the bank of Ranmal Tank and Ranjit Sagar Road are also creation of this period.

1933 to 1941 : During this period, the ruler was Jam Shri Digvijaysinh. In this era, the development of famous residential sector viz. Digvijay Plots and Gulabnagar took place. Strong industrial base like Digvijay Wollen Mills also started. The city was also fortunate to figure it self on the map of Air Service with the introduction of aerodrome facilities. The renowned Ayurvedic College, Municipal Office Building, and the defense establishment also took place.

Post 1947 era. : The vital road axis joining Bedi Ports & Bedi Gate encouraged the development of Kasturba Vikas Gruh, Patel Colony, D.K.V. College, Medical College, T.B.Hospital, Gandhinagar, various Oil industries & Residential Clusters. Industrial Estate in Hapa, GIDC Estate on Porbunder Road-Khambhaliya Road Bye-pass are the prime developing locations.