Objectives: This study was aimed to determine the magnitude and associated risk factors of low back pain among taxi drivers in Addis Ababa, Ethiopia.rnMethods: A cross sectional study was conducted among 422 full time taxi drivers from February to May 2015. The data were collected using questionnaire adapted from Nordic questionnaire. The questionnaire included questions about socio demographic variables, work-related, lifestyle activity and psychosocial characteristics. Prevalence of LBP was assessed as frequencies of study subject those response experiences of LBP and the data were obtained using an interview questionnaire. Bivariate analysis was used to assess the association between these variables and Multivariate analysis to control confounding variables.rnResults: Prevalence of LBP was found to be 64.2%. The study found year of driving, history of back trauma, frequent load lifting, lack of rest break during work day, uncomfortable seat pan and previous job involve sitting as risk factors for LBP among taxi drivers in this study. LBP was associated significantly with history of back trauma (OR=4.014, 95% CI 2.329-6.916, p