The Earth Alliance is the name of at least two fictional governments or alliances in modern science-fiction, and a proposed, UNEP-like organization.

• In Babylon 5, the Earth Alliance is the government of human space, which developed and built the Babylon Space Station Project.
• In Gundam Seed, the Earth Alliance is the military alliance of four powerful nations which controls most of the Earth and fights against ZAFT during the Bloody Valentine War.
• A prooposal by the German Advisory Council on Global Change (WBGU) for the establishment of an international organization comprising the assessment, organization, coordination, and funding of global environmental policy solutions. ^*