OBJECTIVE: We examined barriers to accessing medical care for migrant US-residing Marshallese Islanders. METHODS: Cross-sectional analyses were conducted to identify potential inequities. Surveys from largely migrant diabetic Marshallese Islanders (n = 255) were compared with nationally representative data. Two major outcomes were assessed including 1—whether or not one reported having forgone medical care in the past year because of cost—and 2—whether or not one reported not having a usual source of care. RESULTS: Overall, 74% and 77% of Marshallese Islanders reported forgone care and no usual source of care, respectively, versus 15% and 7% of the US diabetic population. In multivariable analyses, being younger; uninsured; unemployed; male; of lower education; Native American or Hispanic (versus White); and residing in the South were associated with forgone care nationwide, whereas only lacking insurance was associated with forgone care among Marshallese Islanders. Nationwide being younger; uninsured; unmarried; female; of lower education; Native American or Hispanic (versus White); and residing in the South were associated with not having a usual source of care, whereas only being younger and uninsured were associated with not having a usual source of care among Marshallese Islanders. CONCLUSION: The largest group of diabetic Marshallese Islanders in the continental US faces severe healthcare access inequities necessitating policies that increase access to health insurance options and associated resources.