Tujuan penelitian ini untuk mengetahui struktur ekonomi, kondisi basis ekonomi sektoral dan kondisi kegiatan ekonomi yang potensial di Kabupaten Nunukan Tahun 2011-2020. Metode yang digunakan dalam penelitian ini adalah metode Location Quotient (LQ), Dynamic Location Quotient (DLQ), Shift Share dan Tipology Klassen. Dari hasil penelitian location quotient (LQ) menunjukkan terdapat 2 sektor basis yaitu sektor pertanian, kehutanan, dan perikanan dan sektor pertambangan dan penggalian. Berdasarkan hasil penelitian dynamic location quotient (DLQ) menunjukkan terdapat 4 sektor yang prospektif yaitu sektor pertanian, kehutanan, dan perikanan, sektor pertambangan dan penggalian, sektor jasa perusahaan, dan sektor administrasi pemerintahan, pertahanan dan jaminan sosial wajib. Berdasarkan hasil penelitian shift share struktur ekonomi didominasi oleh sektor primer. Berdasarkan hasil penelitian tipology klassen menunjukkan yang tergolong sektor maju dan tumbuh dengan pesat, yaitu sektor pertanian, kehutanan, dan perikanan, dan juga sektor pertambangan dan penggalian. Sektor yang tergolong sektor potensial yaitu sektor jasa keuangan dan asuransi, sektor jasa perusahaan, sektor administrasi pemerintah, dan jaminan sosial wajib, dan juga sektor jasa pendidikan.

The purpose of this research was to figure out the economic structure, sectoral economic basic conditions and potential economic activity conditions in Nunukan Regency in 2011-2020. This research used Location Quotient (LQ), Dynamic Location Quotient (DLQ), Shift Share, and Klassen Typology. From the location quotient (LQ) results, it shows that there were 2 basic sectors consisting of agricultural, forestry, and fishery as well as mining and excavation sectors. Based on the dynamic location quotient (DLQ) results, it shows that there were 4 prospective sectors consisting of agricultural, forestry and fishery, mining and excavation, corporate services, and government administration, as well as defense and compulsory social security sectors. Based on the shift share results, the economic structure was dominated by the primary sector. Based on the Klassen typology results, the sectors classified into the advanced and rapidly growing sectors were agricultural, forestry, and fishery, as well as mining and excavation sector. The sectors classified into the potential sectors were financial and insurance services, corporate services, government administration, compulsory social security, and education service sectors.