The prime aim of this research was to determine both demotivating and motivating factors for Pakistani college students of Quetta in learning English language. A quantitative design was employed in which 150 freshman college students studying in three different disciplines: Pre-medical, Pre-engineering and I.C.S at Government Girls college students of Quetta, Pakistan were included. A demotivation questionnaire was adopted from the study by Sakai & Kikuchi(2009) consisting of one open-ended question and 35 close-ended items on six factors of demotivation: grammar-based teaching, teacher's behaviour, course contents and teaching materials, effects of low test score, classroom environment and lack of self-confidence and interest. Additionally, a modified 20-items AMTB motivation questionnaire along with one open-ended question was adapted from the study by Gardner (1985) which identifies the integrative and instrumental motivation. The closed ended questionnaire was analyzed applying descriptive statistics in SPSS (version, 22) whereas content analysis was performed on narrative data extracted from open-ended questionnaire and was quantified to establish the order and rank of factors causing motivation and demotivation among students in learning English language. The findings revealed that course content and teaching material emerged as the most salient demotivating factor. On the other hand, instrumental motivation emerged as the most influential source of motivation among students. The findings have implication on both teaching and learning of English language in Pakistan.