The main objective of this work, is studying the causes of racial inequality regarding the independent impact of urban and suburban residency. This study further assesses the impacts of these social locations over a three-decade period. While scholars pose that city size positively impacts behavior, there is debate regarding the impact of these locations over time. Using the General Social Survey, findings demonstrate that while urbanism continues to have an independent impact on beliefs, the impact of suburban residency is much weaker and inconsistent. Analyses of over time trends reveal that the gap between urban and rural residents appears to have increased, with rural residents expressing more intolerant beliefs about the causes of racial inequality over time. The research pays a special attention upon some big cities such as karaj containing several racial people and studies this point that the existence of some racial paradox such as color, is serious or not and finally this point has been found that there is not very serious paradox about this matter but that, itself is a very important one, which needs being paid attention and in general, the migration trend in these big cities should be declined with performing the applicable and useful programs.