Objective: The aim of the study is to determine the influence of maternal anthropometry on the birth weight of the newborn. Materials and Methods: The present study was undertaken at Dr. BR Ambedkar medical college and KC General Hospital Bangalore. Hundred and eight mothers who gave birth to uncomplicated singleton pregnancy, and their newborn were examined. Maternal anthropometry like height, weight, BMI, symphysis fundal height, abdominal circumference, upper mid arm circumference and neonatal parameters like birthweight, head, chest and abdominal circumference were recorded. Mothers were classified on the basis of BMI into 3 groups: Group I BMI 22.57, Group II BMI< 22.57-26.52 and Group III BMI >26.52. Results: Mothers with a body mass index (Kg/m2) of < 22.57 belonging to group I gave birth to male babies with a mean birth weight (in Kgs) of 2.59+0.14 or female babies weighing 2.38±0.40. Mothers with a body mass index (kg/m2) of 22.57-26.52 belonging to group II gave birth to male babies with a mean birth weight (in kgs) of 3.40 ± 0.26 or female babies weighing 2.67+0.24. Mothers with a body mass index (Kg/m2 ) of >26.52 belonging to group III gave birth to male babies with a mean birth weight (in Kgs) of 3.40±0.30 or female babies weighing 2.87±0.67. Conclusion: There was a statistically significant positive correlation between maternal body mass index with birth weight in Group I and Group II (P<0.05) However in Group III male and female babies were non-significant (P>0.05).