The state with the highest Health Insurance costs in the United States is Alaska. According to a study conducted by the Kaiser Family Foundation in 2020, the average annual premium for a benchmark plan in Alaska was $8,516, which was significantly higher than the national average of $5,592. Factors contributing to the high costs in Alaska include the state's remote location, a small population spread across a large area, and the high cost of healthcare services and medical facilities. It's important to note that Health Insurance costs can vary depending on various factors such as age, income, and the specific plan chosen. Therefore, it's always recommended to compare different options and consult with a licensed insurance professional for personalized advice.