This paper establishes a cross-dialectal typology of relative clauses in various German dialects and Yiddish according to their form and function. A great variety of different types of relativizers and relative clauses can be observed, including various pronouns, particles, and zero relatives. Combinations of these types occur, one of the most typical involving a resumptive element in a clause introduced by a particle. Concepts developed in typology such as the Accessibility Hierarchy can be used with great profit for this study. It turns out that for the German relativization system, a basic opposition between subject and direct object as opposed to oblique holds in virtually every variety, whereas the indirect object is much less stable. Some of the types observed fit into larger linguistic areas. In the varieties observed, significantly more relative particles and resumptive elements occur as compared to Standard German, which turns out to be quite atypical. © 2004 by Walter de Gruyter GmbH & Co. KG, D-10785 Berlin. All rights reserved.