United States gallium nitride power device market is valued at USD 634.76 million in 2026 and is projected to reach USD 3,317.76 million by 2036, advancing at a CAGR of 18.0% across the 2026–2036 period. The Pacific states form the largest modeled U.S. subregion at ~28% of 2026 revenue, supported by demand for high-density power conversion.