This study examined how politics, along with familial and socioeconomic factors, influence the life satisfaction of marriage migrants in Taiwan. We conducted a social survey in Taiwan and offered a multidimensional and dynamic view on adaptation and life satisfaction among them. The results showed that in Taiwan, family relationships and socioeconomic class were significant factors of life satisfaction among mainland Chinese marriage migrants. A high level of social integration was positively related to life satisfaction, while the prejudice faced from neighbors, rather than from the media, was negatively related. Regarding political factors, political disagreement with their Taiwanese partners undermined life satisfaction among spouses from mainland China. However, those who possessed a dual identity (i.e., both Chinese and Taiwanese) and those who viewed mainland China and Taiwan as two separate entities tended to have high levels of life satisfaction.