Present study investigates fertility and its determinants among the Lamkang tribe on the basis of household survey collected from 10 villages of Chandel District (Manipur), interviewing 200 ever married women. The findings indicate that the age group of 15-50 years, comprising of the population at peak productive ages, constitutes 64.39% of Lamkang population. The sex ratio of 1105 reveals the preponderance of females over males. Regression analysis suggests that biological and social factors like age at menarche, age at marriage, age at first conception, women’s education have an inverse relationship with number of conceptions and live births whereas education of husband and type of family are inversely proportional with live birth only.