Chapters are organizations that support Wikimedia projects in specified geographical regions, mostly countries. Currently, there are 41 chapters.

Wikimedia Deutschland (WMDE) is the largest chapter, with a total budget of 20 million EUR. WMDE allocates approximately 1 million EUR to support the corporation responsible for distributing donations, and 4 million EUR for transfer to the WMF.

To have the same procedure, every chapter follows the same process and requests its yearly budget at the funds dissemination committee. The foundation as internet domain owner of the project pages requests a share of the donations via the website in a country (e.g. for Germany, Switzerland), or pays a chapter the agreed amount (other chapters). A total of under 4 Mio USD is distributed via this way to chapters and thematic organizations. The legal base is a "Chapters Agreement" with the foundation.

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