Abstract The research method used in this study is LQ analysis to determine the base sector and non-base sector and shift share analysis to determine changes in regional economic structure/performance towards a higher economic structure (province) as a reference. This study uses secondary data obtained from the Central Statistics Agency. Based on the results of LQ's analysis, it is known that there are 12 base (superior) sectors in West Lombok Regency, namely a) the processing industry sector, b) the electricity and gas procurement sector, c) the water procurement sector, waste management, waste and recycling sector, d) the construction sector, e) the transportation and warehousing sector, f) the accommodation and food and beverage provision sector, g) the information and communication sector, h) Real Estate Sector, i) Government Administration, Defense and Compulsory Social Security Sector, j) Education Services Sector, k) Health Services and Social Activities Sector, l) Other Service Sectors. Based on the results of the shift share analysis, the national share/KPN value shows that the economy of West Lombok Regency is growing faster than the average growth of NTB Province. The proportional shift value / KPP shows positive and negative values, meaning that the sector's growth is slower than the same sector in NTB Province. The differential shift/KPPW value shows that West Lombok Regency has a low competitive advantage even though there are several sectors with positive values. Key Words: leading sectors, economic growth