A descriptive study was conducted to assess the knowledge regarding dental hygiene among school going children in a selected school of Delhi. A sample of 100 students , who fulfilled the inclusion criteria were selected using simple random sampling method. A structured knowledge questionnaire was used to assess the knowledge on dental hygiene among school students. Data was collected from 8th and 9th class students attending a selected school of Delhi.The data analysis and interpretation was done using descriptive and inferential statistics. The study result reveal that basic oral hygiene knowledge and practice of the studied participants were good and study suggested to improve advanced knowledge in children.