The disclosed computer-implemented method for aggregating information-asset metadata from multiple disparate data-management systems may include (1) receiving a first instance of metadata of an information asset from a first data-management system that manages information assets of an entity in a first domain, (2) receiving a second instance of metadata of the information asset from a second data-management system that manages the information assets of the entity in a second domain that is separate and distinct from the first domain, (3) storing the first and second instances of metadata in a global metadata repository that is separate and distinct from the first and second data-management systems, and (4) providing access to the first and second instances of metadata stored in the global metadata repository to the first data-management system, the second data-management system, and/or the entity. Various other methods, systems, and computer-readable media are also disclosed.