Several studies confirmed that morality is developmental process and it increases gradually. Many intrinsic and extrinsic aspects affect moral development (Siddique & Lodhi, 2014). Hart and Carlo (2005) stated that different environmental elements and aspects have deep impact on moral development of children. The atmosphere of home develops moral level of the students enormously. The main objective of the study was to assess the effect of demographics on moral development of secondary school students. Gender, locality, parents’ education and economic status of parents are the selected demographics for this particular study. Moral development was estimated through moral development interview inventory. The study encompasses the four district of the Punjab province. The sample was consisting of 1000 secondary school students. Random sampling technique was brought out to conduct the study and quantitative approach was used to complete the study. Moral development interview inventory (MDII) was applied to calculate the moral development level of secondary school students. SPSS version 20 was applied to find the result. Descriptive statistics, t-test and ANOVA were used for data analysis. Significant effect was found on moral development of secondary school student according to demographics of gender, locality, and mothers’ qualification whereas fathers’ qualification and economic status keeps insignificant effect on moral development of secondary school students.