What is a WikiProject?
A WikiProject is a group of contributors who want to work together as a team to improve Wikidata. These groups often focus on a specific topic area (for example, astronomy) or a specific kind of task (for example, solving problems related to disambiguation pages).
Current WikiProjects on Wikidata
Several WikiProjects have been created, here is the top level list that branches down to individual projects:
Creating a WikiProject
If you don't see a WikiProject on the above list that reflects your interests or deals with an area of Wikidata that you would like to work on, do not hesitate to initiate a new one!
For categorizing WikiProjects, use appropriate subcategories in the form of Category:Geographical WikiProjects (for WikiProject France, WikiProject Rivers, and so on) and Category:Sports WikiProjects (for WikiProjects Baseball, WikiProjects Basketball, and so on)—not Category:WikiProjects Geography and Category:WikiProjects Sports.
If you want to suggest a new WikiProject (instead of creating one yourself), don't hesitate to put it on the talk page.