islands Hòn Lớn, Hòn Một, Hòn Mun, Hòn Miễu, Hòn Tằm. Nha Trang Town was made the capital of Khanh Hoa Province. The town included two districts. District 1 covered communes Nha Trang Đông, Vĩnh Hải, Vĩnh Phước, and villages Ngọc Thảo, Ngọc Hội and Lư Cấm of Vĩnh Ngọc Commune, Vĩnh Điềm Hạ village of Vĩnh Hiệp Commune. District 2 covered communes Nha Trang Tây, Vĩnh Trường, Vĩnh Nguyên (inclusive of islands of Hòn Tre, Hòn Một, Hòn Mun, Hòn Tằm), Phước Hải village of Vĩnh Thái Commune.
Following that establishment, the government by Decree 357-ĐUHC/NC/NĐ dated 5 June 1971 divided Nha Trang into 11 urban zones, of which, district 1 covered urban zones of Vĩnh Hải, Vĩnh Phước, Ngọc Hiệp, Vạn Thạnh, Duy Tân; district 2 covered urban wards of Vĩnh Nguyên, Vĩnh Trường, Phương Sài, Tân Phước, Tân Lập, Phước Hải. Decree 553-BNV/HCĐP/NV dated 22 August 1972 renamed urban zones into urban wards. Decree 444-BNV/HCĐP/26.X dated 3 September 1974 merged islands of Hòn Một, Hòn Cậu, Hòn Đụn, Hòn Chóp Vung, Hòn Đỏ into Vĩnh Hải ward (district 1) and Hòn Ngọc into Vĩnh Nguyên ward (district 2) of Nha Trang Town.
On 2 April 1975, communist (NLF/PRG/VPA) forces captured the city. On 4 April 1975, Khanh Hoa Military Commission (Ủy ban Quân quản Khánh Hòa) divided Nha Trang into three administrative districts: District 1, District 2 and Vĩnh Xương District.
In September 1975, District 1 and District 2 were merged to become one entity, the town of Nha Trang.
On 30 March 1977, the Council of the Government (now the cabinet) of the Socialist Republic of Vietnam by Decision 391-CP/QĐ upgraded Nha Trang to city status, a county-level city under the administration of Phu Khanh Province (a province created by merger of now Phú Yên Province and Khánh Hòa Province). Seven communes of former Vĩnh Xương County, namely
