The Youth Climate Leadership Act of 2026 would establish youth advisory councils at five federal agencies: the Environmental Protection Agency, Department of the Interior, Department of Energy, Department of Agriculture, and Department of Commerce. These councils would consist of 15 to 25 members aged 16 to 29 who would provide recommendations to agency leaders on environmental issues affecting young people, with a focus on climate change, pollution reduction, and environmental justice in disadvantaged communities. At least half of each council's members must come from, reside in, or work in disadvantaged communities, and members would serve two-year terms while meeting at least annually. The bill authorizes $250,000 per year for each of the five agencies from fiscal years 2027 through 2037 to establish and operate these councils, with each agency providing administrative support and educational curriculum to council members.