This study was an attempt to examine the effects of two components of social identification (i. e., ethnic and mainstream) on stress related to both cultural disparity and perceived discrimination. Results based on a sample of 164 Hispanics indicated the independence of these two dimensions of social identification. As hypothesized, lack of mainstream acceptance was associated with acculturative stress. Furthermore, among individuals with a high level of ethnic identification, poor identification with the mainstream resulted in more stress than high mainstream identification. These findings suggested that the bipolar model, in which ethnic and mainstream affiliation are considered opposites of each other, should be revised.