Penelitian ini berbentuk causal-comparative. Tujuan dari penelitian ini adalah untuk mengetahui profil dari hasil Ujian mata pelajaran bahasa inggris yang dilaksanakan di Sekolah Menengah Atas (SMA) Tana Tidung dan mengetahui perbedaan antara hasil Ujian Nasional dengan Ujian Sekolah terhadap Jurusan (IPA dan IPS), Jenis Kelamin (Laki-laki dan Perempuan), Akreditasi Sekolah (A dan B), Kecamatan (Sesayap, Sesayap Hilir dan Tana Lia) dan Rata-Rata Nilai Ujian Nasional (Baik, Cukup dan Kurang). Sampel diambil sebanyak 258 siswa dari 3 (tiga) SMA di Kabupaten Tana Tidung dengan menggunakan Total sampling. Sekolah yang menjadi sampel penelitian adalah SMAN Terpadu Unggulan 1 Tana Tidung, SMAN 1 Tana Tidung, dan SMAN 2 Tana Tidung. Hasil penelitian mengenai profil Hasil Ujian Nasional dan Ujian Sekolah mata pelajaran Bahasa Inggris SMA di Tana Tidung: (1) ada perbedaan antara hasil Ujian Nasional dengan Ujian Sekolah pada siswa SMA Tana Tidung (2) ada perbedaan antara hasil Ujian Nasional dengan Ujian Sekolah terhadap Jurusan (3) ada perbedaan antara hasil Ujian Sekolah pada siswa laki-laki dan perempuan (4) ada perbedaan antara hasil Ujian Sekolah pada sekolah dengan akreditasi A dan akreditasi B. (5) ada perbedaan antara hasil Ujian Sekolah pada sekolah di Sesayap, Sesayap Hilir dan Tana Lia (6) ada perbedaan antara hasil Ujian Nasional dengan Ujian Sekolah terhadap Rata-Rata Nilai Ujian Nasional.

This was a causal-comparative research. The purpose of this research was to determine profile of the English test results conducted at the High Schools (SMA) in Tana Tidung and to find out differences in results of national and school examinations based on majors (sciences and social studies), gender (male and female), school accreditation (A and B), districts (Sesayap, Sesayap Hilir and Tana Lia) and grade of national examination score (Good, Fair and Poor). A total of 258 students from 3 (three) high schools in Tana Tidung Regency was taken as samples using a total sampling technique. The sample schools were SMAN Terpadu Unggulan 1 Tana Tidung, SMAN 1 Tana Tidung, and SMAN 2 Tana Tidung. The results showed that: (1) there were a difference between the results of the national and school exams of senior high school students Tana Tidung; (2) there was a difference in the results of the national and school exams between science and social students; (3) there was a difference in the results of school exams between male and female students; (4) there was a difference in the results of school exams between schools with accreditation A and accreditation B; (5) there was a differences in the results of school exams among schools in Sesayap, Sesayap Hilir and Tana Lia (6) there was a difference in the results of the national and school exams among good, fair, and poor students.