Newborn care is of immense importance for the proper development and healthy life of a baby.  Increased access to some components of newborn care for mothers giving birth can also be an effective strategy to reduce neonatal morbidity and mortality. Essential newborn care (ENC) is a comprehensive strategy designed to improve the health of newborns through interventions before conception, during pregnancy, at and soon after birth, and in the postnatal period. A Non-experimental descriptive survey was done to assess knowledge of the post natal mothers regarding essential newborn care in the selected government hospital of Delhi. 100 post natal mothers admitted in the maternity unit of the selected hospital were selected through convenient sampling technique. Variable under study included knowledge regarding essential newborn care. It was seen that Among the 100 study subjects 47% belonged to age group 20-25 years. 44% of subjects were having education till higher secondary.  Most of the subjects i.e 91 % were housewives. 51 % of the subjects were primigravida and 49% of the subjects were multipara. 53 % subjects got the information regarding essential newborn care from health personnel followed by 39 % from family members. Study revealed that 61 % mothers had moderate knowledge regarding essential newborn care. 24 % mothers had adequate knowledge and only 15 % mothers had inadequate knowledge regarding essential newborn care. It was found from the data that educational status of the mothers had significant association with the knowledge of the mother regarding essential newborn care. Other demographic variables did not show any statistically significant association with knowledge score of the mothers.