Oral diseases have a significant impact on health and wellbeing of an individual. Among oral diseases, dental caries is the most common disease of childhood. Diet and nutritional factors play important roles in growth, maintenance and repair of oral tissues and structures .The objective is to find the association between dental caries and nutritional status among 4 to 6 years old children attending Kanti Children Hospital. Cross sectional study was done on 4-6 years old children. A total of 295 were observed by using systematic random sampling technique. Oral examination, anthropometric measurements were used to assess the dental caries and nutritional status of the children attending Out Patient Department of Kanti Children Hospital The result showed that 61.4 % children were found with caries with mean decayed missing filled teeth (dmft) 2.89. Caries proportion in boys was higher than in girls 64.5 % and 56.3 % respectively. The number of carious teeth in an individual varied from 1 to 15. The study found that majorities of children were stunted 71.2%, underweight 21.4%and only 0.3% were wasted. However, the difference in proportion of dental caries between well-nourished and malnourished children was statistically not significant. The prevalence of dental caries is high in 4-6 years old children. Majority of children have untreated dental caries that shows lack of awareness and lack of perceived need to visit dentist.