AbstrakPembangunan daerah di wilayah tertinggal merupakan upaya mengembangkan potensi-potensi ekonomi sehingga mempunyai daya saing dan meningkatkan pertumbuhan ekonomi. Penelitian ini bertujuan untuk menganalisis potensi ekonomi serta kinerja sektor ekonomi setiap wilayah tertinggal di Jawa Timur. Penelitian ini menggunakan data sekunder berupa data PDRB, dengan alat analisis Location Quotient dan Shift Share Esteban Marquillas, yang terdiri dari data times series selama periode 2009-2013, dengan menggunakan PDRB 9 sektor dan data cross section 4 kabupaten tertinggal di Jawa Timur. Hasil analisis Location Quotient sektor basis di Kabupaten Bondowoso (pertanian), Situbondo (pertanian dan perdagangan, hotel dan restoran), Sampang (pertanian, pertambangan dan penggalian), Bangkalan (pertanian, bangunan dan jasa-jasa). Hasil analisis Shift Share sektor kompetitif di Kabupaten Bondowoso (pertanian, pengolahan, listrik, gas dan air bersih dan bangunan), Situbondo (pertanian, industri pengolahan, listrik gas dan air bersih), Sampang (pertanian, industri pengolahan, perdagangan hotel dan restoran, keuangan persewaan dan jasa perusahaan dan jasa-jasa), Bangkalan (pertanian, industri pengolahan, perdagangan hotel dan restoran, keuangan, persewaan dan jasa perusahaan dan jasa-jasa). Dibutuhkan prioritas pembangunan, pengembangan perekonomian lokal, pemberdayaan masyarakat dan penciptaan lapangan kerja.Kata Kunci: Produk Domestik Regional Bruto, Sektor Basis, dan Keunggulan Kompetitif AbstractRegional development in disadvantaged areas in an effort to develop the economic potential so as to have competitiveness and boost economic growth. This study aimed to analyze the economic potential and economic performance of the sector in each region lagging East Java Province that could affect GRDP growth and could be a priority in the implementation of regional development. This study uses secondary data in the form GRDP data, with analysis tools Location Quotient and Shift Share Esteban Marquillas, which consist of the data time series during the period from 2009 to 2013, using the GRDP 9 sectors and cross section 4 underdeveloped districts in East Java. The result of this study indicate that the tool Location Quotient, a sector basis contained in the district of Bondowoso is the agricultural sector, a sector basis in Situbondo district is agricultural sector, trade, hotels and restaurants sector, a sector basis in Sampang district is agricultural sector, mining and quarrying sector, a sector basis in Bangkalan district is agricultural sector, construction sector and services sector. From the analysis of the Shift Share Esteban Marquillas sector with competitiveness (competitive) in the Bondowoso district is agricultural sector, manufacturing sector, electricity, gas and water supply sector, construction sector. A competitive sector in Situbondo district is agricultural sector, manufacturing sector, electricity, gas and water supply sector. A competitive sector in Sampang district is agricultural sector, manufacturing sector, tra...