A cross-sectional sample survey of 556 adolescent girls (10-18 years) was covered by house-to-house visit in an urban area of Meerut which is the field practice area of Department of Community Medicine, L.L.R.M. Medical College, Meerut. In this particular study, socio-demographic factors causing anaemia in adolescent girls were studied. Results showed a significant difference in prevalence of anaemia in adolescent girls in relation to caste, socio-economic status, father's occupation and mother's education. Reverse association was seen between socio-economic status and the prevalence of anaemia in adolescent girls. Lower the socio-economic status, higher the prevalence of anaemia i.e. maximum (47.6%) in class V and minimum (29.1%) in class I and II. Fathers who were professionals had least prevalence of anaemia in their adolescent daughters.