Parental alcohol use is a growing public health concern with significant implications for the emotional well-being and academic performance of children and adolescents. Evidence from Pacific Island countries, including Papua New Guinea (PNG), remains limited. A cross-sectional study was conducted among 109 upper secondary school students in Port Moresby. Data were collected using a structured self-administered questionnaire assessing parental alcohol use, parental involvement, home environment, emotional outcomes, and academic performance. Descriptive statistics, Fisher’s exact test, and binary logistic regression analyses were performed to examine associations between household factors and learning and concentration difficulties. Nearly 70% of students reported parental alcohol use, and approximately three-quarters indicated minimal or no parental involvement in their education. Emotional distress was reported by 66.1% of participants, while over two-thirds demonstrated poor to average academic performance.