- Mediation Committee – panel of editors who resolve content disputes on Wikipedia articles by providing formal mediation
- Ban Appeals Subcommittee – a former branch of the Arbitration Committee that heard appeals by email from users who are banned or blocked by community processes. It was dissolved by motion of the Committee on 15 November 2015.
- Audit Subcommittee – branch of the Arbitration Committee which investigated complaints about the misuse or abuse of the advanced permissions CheckUser and Oversight
- Ombudsmen Committee – failed proposal for a committee to look back on disputes and give recommendations how they could be handled better in the future
- Not to be confused with the cross-wiki Ombuds Commission, the active group of Wikimedia users who conduct official investigations over violations of the privacy policy for the Wikimedia Foundation, especially with regards to CheckUser.
- Mentorship Committee – informal, now-inactive committee that was set up to mentor users put on probation or mentorship by either the Arbitration Committee or the community
- Guidance Committee – now-defunct group of community members responsible for guiding the community to building an encyclopedia
- Wikipedia Committees – failed proposal for reforming Wikipedia governance through a system of committees based on arbitration, policy and appeals
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