The present book “Socio-Economic Profile of the Muslims in the Kosi-Mahananda Doab, Bihar: A Geographical Analysis” investigates the factors of backwardness and analyzes the socio-economic scenario of the Muslims living in between these two important rivers of Bihar. Almost half of the population of this study region belongs to the Muslim community. This is the first book of its kind about the socio-economic geography of the Muslims of the region. Apart from the introduction and conclusion, a detailed analysis and description about the density and distribution of population, literacy, economy, social and demographic conditions, social welfare index, planning and management of natural disaster, natural resources, agricultural, infrastructural, economic and educational developments of the Muslims have been discussed. It is hoped that this book will be immensely helpful for the further research about the regional geography of the region and socio-economic conditions of the Muslim community as a whole.