Background: Adolescent is derived from Latin word meaning is to grown up. Adolescents comprise 20% of the world’s total population, out of 1.2 billion Adolescents worldwide, about 85% live in developing countries. In India, there are 190 million adolescent’s comprising 21% of India’s total populations. Teenage pregnancy is an important public health problem in both developed and developing countries,as it is a ‘high risk’ or ‘at­ isk’ pregnancy due to its association with various adverse maternal and foetal outcomes which results in increased mortality and morbidity of the mother and the child. Objectives: To assess the knowledge of adolescent girls towards teenage pregnancy. To find out the association between knowledge of adolescent girls towards teenage pregnancy with their selected socio demographic variables. To prepare information booklet of knowledge towards teenage pregnancy. Mehods: A descriptive study involving 100 adolescent girls was carried out with self administrated schedule. Data were collected using a structured questionnaire and purposive sampling technique. It included data regarding socio­ demographic characters tics and questionnaire pertaining to knowledge of adolescent girls towards teenage pregnancy. Result: Out of 100 participants, 34% of father’s were intermediate, 32% of mother’s were primary education and 55% of family income per month. It was seen that 41% adolescent girls had moderate knowledge,34% had adequate and 25% had inadequate knowledge towards teenage pregnancy. 96% participants knew about the first sign of pregnancy that is absence of menstrual cycle. Conclusion: The knowledge of adolescent girls have towards teenage pregnancy is moderate. So, there is need to educate the adolescent girls towards teenage pregnancy, in order to reduce maternal and child mortality and morbidity rates.