The USA hydrogen bus market is set for substantial growth, with a projected value of USD 1.5 billion by 2035 and a strong compound annual growth rate of 25.6% from 2025. The market's expansion is fueled by the shift towards cleaner transportation technologies to reduce carbon emissions and enhance sustainability. Federal and state government regulations, along with incentives, are accelerating the adoption of hydrogen buses across the country. The adoption is supported by advancements in hydrogen fuel cell technology, infrastructure development, and increased public awareness of environmental sustainability. Key trends in the market include the dominance of Proton Exchange Membrane Fuel Cells (PEMFC) in powering hydrogen buses, the expansion of hydrogen refueling infrastructure, and government support through grants, subsidies, and tax incentives. The USA's commitment to reducing its carbon footprint and decarbonizing public transportation is driving the transition to hydrogen-powered buses, particularly in metropolitan and urban areas. Major cities like Los Angeles, San Francisco, and New York have already integrated hydrogen buses into their public transportation systems to meet emission reduction goals and promote environmental sustainability. The Biden administration's targets to reduce carbon emissions and shift to a net-zero economy align with the adoption of zero-emission transportation solutions, including hydrogen buses. The article also discusses key segment analysis by technology, highlighting Proton Exchange Membrane Fuel Cells (PEMFC) as the most widely used technology in the USA hydrogen bus market, with advantages in efficiency and operational reliability.