In US, big cities, such as Washington, New York, their population must more than small cities. Although, US have high population who are living in big cities. However, it is not represent that high big cities population must have many customer number more than small cities. Otherwise, US small cities will have possible more customer number to compare large cities for some kinds of products or services. What factors can influence US, big cities and small cities residents' consumption behaviors are different. I shall explain the factors as below: The politics of mass consumption in US big cities and small cities residents' consumption habitual factor. Historians and social scientists has researched on the politicial and social impact of mass consumption on nowadays century America. They indicate the culture, social and political different factors between US large cities and small cities, which will influence the mass consumer behaviors and markets difference. For example, in cultural difference view point, US big cities residents can be more acceptable to buy any new kinds of products more than US small cities residents. So, for any kinds of new products the US big cities residents will be the major customers more than the US small cities residents, due to their cultural level, educational level are influenced more acceptable to use any new products changing attitudes more easily than small cities residents in US.Otherwise, US small cities residents who have much traditional minds and attitudes and they can not accept to use any new kinds of products. So, US big cities and small cities residents' cultural and educational level and living habits are different. This factor can influence US big cities and small cities residents whose consumption behaviors to any new kinds of products. Hence, it seems that US big cities' any kinds of new products can be sold more easily than US small cities' any kinds of new products. It means brand, price, quality factors to new kinds of products are not the most influential factors to US big and small cities consumers to choose to buy. The US big and small cities' cultural level difference will seem be the main influential factor to influence US residents to choose to buy any kinds of new products nowadays. So, if the new product provider can change US small cities residents' traditional attitudes to accept to use any kinds of new products. Then, the US small cities' new product supplier can raise its sale effort more easily in possible.The other factor is that segmentatin of US big cities and small cities teenagers in terms of their buying behaviors and attitudes towards commercial consumption are different. For example, the US big cities and small cities teenagers' commercial valuables are different. It means that the US big cities teenagers have higher commercial valuables to every products. Their demands to each product's using value, quality value will be higher to compare the US small cities teenagers. So, they prefer to choose to buy more expensive products because they feel that they have higher commercial valuables to compare cheaper products. Otherwise, the US small cities teenagers who have lower commercial valuables to any products. So, they prefer to choose to buy cheaper products, because they will feel cheaper products have lower commercial valuables in generally.