Abstract: Emotional and behavioral disorders are potential causes of disciplinary problems in the classroom. The main interest of the study is the EBD and achievements of Grade 1 pupils in public schools of South Cotabato. About 210 Grade One pupils and teachers were involved as subjects and respondents of this inquiry. A questionnaire in EBD was given to teachers for them to carefully assess the pupils’ ODD, CD and ADHD level. The survey tools were modeled after the Noanxiety.com resources and the Vanderbilt Rating Scales. Records of pupils’ gender, curricular and extra-curricular achievements were taken from the teachers’ own class records. Gathered data were suitably tabulated and presented in tables and chart. Both descriptive and inferential statistics were applied to treat the data. Specific tools like percentages, Multiple Linear Regression Analysis, mean and t-test were employed to analyze the collected data. As found out, the Grade 1 pupils’ EBD level is singly, and collectively of moderate levels. They have very good level in curricular and extra-curricular achievements alike. Male pupils have relatively higher EBD level than the females. Inversely, the female pupils have comparatively higher achievement than the males. The pupils whose schools were located in highly urbanized places have higher EBD level than those in the less urbanized areas. Also, the achievements of the pupils from schools situated in less urbanized areas were higher than those in the highly urbanized areas. This study concluded that only the pupils’ attention deficit hyperactivity disorder was linked to pupils’ achievement. Gender and school location also affected pupils’ EBD and achievement levels.