In recent years, alternative energy has become one of the concerns of the Indonesian government due to the increase in energy demand and the decrease in fuel oil reserves. Liquid natural gas (LNG) can be used as an alternative fuel with green energy considerations. LNG in Indonesia has not been used optimally and massively, so the government encourages the regulation of the Minister of Energy and Mineral Resources of Indonesia number 13 of 2020. The existence of a separate LNG source from the receiving terminal makes LNG distribution more difficult. The aim of this paper is to design a mini LNG vessel with a capacity of 10.000 cb m that is capable of distributing LNG in the Papua region, considering that the construction of gas pipeline installations is not possible due to geographical conditions and the high economic investment. A parametric design approach with a linear regression method is used to determine the ship’s principal dimensions. The design of a type C independent LNG tank is calculated by the principle of two-dimensionality based on the IGC code and obtained by pressure vessel standards. This study’s conceptual design consists of a lines plan, general arrangement, intact stability, the design of a type C independent LNG tank, and an economic analysis.