Health insurance coverage is an important measure of our nation’s overall well-being as it provides greater access to medical care, protection from unexpected medical costs, and more economic stability for individuals and families. At the same time, health coverage varies over time, reflecting changes in economic conditions, demographic shifts, such as population aging, and policy changes at the federal and state levels that affect access to care. This brief examines the state-level changes in uninsured rates for three groups: all ages, working-age adults aged 19 to 64, and children under the age of 19. Changes in health insurance coverage were assessed among all 50 states and the District of Columbia using 2023 and 2024 1-year American Community Survey (ACS) data.