Abstract: Objective To investigate the coverage and influencing factors of basic medical insurance system among urban residents in Ningxia Hui Autonomous Region. MethodsA survey was conducted with a self-designed questionnaire among the urban residents selected with stratified random sampling from communities in three municipalities of Ningxia. ResultsTotally 5 385 (87.3%) residents participated the basic medical insurance among 6 104 residents to be covered by the basic medical insurance system.The unconditional logistic regression analyses showed that age,ethnicity,education,marital status,employment status,self-rated health status,and income had significant influence on the coverage rate among the residents. ConclusionThe coverage rate of the basic medical insurance did not meet the goal of 90% in 2009 and measures should be taken to increase the coverage rate.