Background: Adolescents constitute over 21.4% of the population in India and adolescent girls constitute about 10 percent of the Indian population. This age group needs special attention because of the turmoil of adolescence which they face due to the different stages of development that they undergo, different circumstances that they come across, their different needs and diverse problems. The objectives of the study were to determine the prevalence of anemia in the study population and to assess the socio-demographic risk factors associated with the anemia. Methods: Community based cross sectional study conducted in adolescent girls aged 10 to 19 years, permanently residing in the rural field practice area of Department of Community Medicine, SGRRIH&HS Dehradun from April 2019 to September 2020. Results:the mean age of the respondents was 13.8+- 2.68 years. In rural area 13.42+-2.47years while 14.28+- 2.81years in urban area. Majority of participants belongs to nuclear family majority (59.3%) and (64.4%)of adolescent girls belonged to lower middle class in both rural and urban setting respectively. prevalence of anemia among adolescent girls was (63.5%) whereas in Rural area 70.2% and in Urban area prevalence was 56.7%. Prevalence of mild, moderate and severe anemia in Rural area (53.9%), (44.0%), (4%) and in Urban area and (46.8%), (52.6%), (0.6%) respectively. the prevalence of anemia was higher (76.2%) among adolescent girls who belonged to the age group of (14-16 years) Conclusions: Prevalence of anemia was 63.5% with majority of study subjects having mild to moderate anemia. Prevalence of anemia in these girls had a significant association with socioeconomic status of the family.