Background: Gestational age (GA) is a valuable metric for estimating mortality and morbidity as well as evaluating the newborn's level of maturity. Therefore, knowledge of the gestational age (GA) at birth is crucial to guide the appropriate management of a newborn. The aim was to study correlation of foot length (FL) with gestational age at birth and other anthropometric measures among preterm, term and post-term neonates and to study  foot length is applicable as a proxy measurement to predict birth weight and gestational age in newborns. Material and methods: This is a hospital based cross sectional study of 150 newborn babies, done in the Department of Paediatrics, Vinayaka Mission’s Medical College, Karaikal. All live newborn infants were included in the study, while babies with Skeletal deformities were excluded from the study. FL at birth was measured from the centre of the back of the heel to the tip of the big toe. Gestational assessment was done using modified Ballard’s scoring on day one. Linear regression analysis was done to investigate the relation of FL to gestational age, birth weight (BW), head circumference (HC) and crown heel length (CHL).Result: There were 75 males and 75 females. Of the 150 newborns, preterm babies were 24 (16%), term babies were 126 (84%) and post-term babies were 0 (0%). The mean foot length was 7.68 cm with a range of 6-8.7 cm. Foot length correlated significantly (p<0.001) with gestational age in Preterm AGA, Term SGA and Term AGA groups. The correlation coefficient of foot length with gestational age was maximum in Term SGA (r=0.646) and followed by preterm AGA (r=0.48) and Term AGA (r=0.463).The correlation of foot length with birth weight was significant in Term SGA & Term AGA neonates. Foot length correlated significantly with head circumference and chest circumference as well in Term SGA & Term AGA neonates while significant correlation with crown heel length was observed only in Term AGA infants. Conclusion: Foot length correlated significantly with gestational age& other anthropometric variables in preterm & term infants.