Assimilation theories dominate immigration scholarship to examine differential life chances, opportunities, and health of immigrants across three waves of immigrants in the United States. Assimilation theories are widely used in public health to explain the health status of immigrants despite the embedded White supremacist ideology while ignoring the role of whiteness. This article reviews and critiques assimilation theories to propose a critical analysis of whiteness in immigrant health scholarship. Critically analyzing whiteness in immigrant health studies allows us to recognize (a) the problematic framing of assimilation theories because of the theories' devotion to a White-European vision of upward mobility and a mainstream characterized as elite and White and (b) how a purportedly colorblind immigration law reinforces White supremacy through possessive investment in whiteness. To highlight whiteness in immigrant health, we examine the anti-immigration rhetoric and anti-immigrant policies and surveillance while providing implications for future research in the scholarship of immigrant health.