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Background: Congenital heart disease (CHD) is one of the most common developmental anomalies in children. Affected children require special care in dentistry because of their susceptibility to infective endocarditis from oral infections and at high risk to develop oral diseases. Materials and methods: The sample involved children with congenital heart disease (Cases) consisted of 399 male and female aged between (6-12) years, attending to Ibn Al-Bitar specialized center for cardiac surgery. Control group of 485 children were examined from primary schools in Baghdad city. Modified Gingival Index (MGI) was used to assess gingival condition of participants by lobene (1986). Diagnosis of dental anomalies was assessed following criteria of WHO (1977). The assessment of nutritional status was performed using height for age following Centers for Disease Control and Prevention growth chart (3). All data were analyzed using statistical package for social science (IBMSPSS) version 23. Results: The present study revealed that (100%) of the total sample were affected by gingival inflammation with higher mean rank value among CHD cases than control with significant difference (p<0.01). For the total sample, the mild type of gingivitis was the most distributed type, (65.7%) for CHD cases and (99.2%) for control group. No statistically significant differences were found between two gender (P>0.05).The percentage of enamel anomalies was higher among CHD cases than control with high significant difference (p<0.01). For cases, higher mean rank values of count of teeth with any anomaly were recorded among 12 years age group. Males had higher mean values than females with not significant (p>0.05). The value of gingival index according to height for age was higher among stunted cases than not stunted with statistically significant difference (p˂0.05).While the mean rank values of count of teeth with any anomaly were higher among not stunted cases than stunted but statistically no significant difference (p>0.05). Conclusion: The results of current study revealed that these children are at high risk from oral diseases. Children with congenital heart disease had high levels of gingivitis, dental anomalies and malnutrition.