> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/platform/post-download/mariadb-server-5.5.66.md).

# MariaDB Server 5.5.66

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## About this Release

* MariaDB Server 5.5.66 was released on 5 Nov 2019.
* Please note: Newer releases exist within the MariaDB Server 5.5 release series.
* [What's new in this release?](/docs/release-notes/community-server/old-releases/5.5/5.5.66.md)
* MariaDB Server is open source software. [Source code is available.](/docs/server/clients-and-utilities/server-client-software/download/getting-the-mariadb-source-code.md)
* This release is Stable (GA) maturity.
* This release contains [security content](/docs/release-notes/community-server/old-releases/5.5/5.5.66.md)

## About this Release Series

* This release is part of the MariaDB Server 5.5 release series.
* The MariaDB Server 5.5 release series will be supported until April 2020.
* [What's new in this release series?](/docs/release-notes/community-server/old-releases/5.5/changes-improvements-in-mariadb-5-5.md)

## Release History

* The prior release in this series was MariaDB Server 5.5.65, released on 31 Jul 2019.
* This release (MariaDB Server 5.5.66) was released on 5 Nov 2019.
* The next release in this series is MariaDB Server 5.5.67, released on 28 Jan 2020.
* The latest release in this series is MariaDB Server 5.5.68, released on 12 May 2020.

## Useful Resources

* [MariaDB Server Documentation](https://mariadb.com/docs/server/)
* [MariaDB Connectors Documentation](https://mariadb.com/docs/connectors/)
* [Contact Us](/docs/general-resources/about/contact-us.md)
* [Learn about the MariaDB Community](/docs/general-resources/community/joining-the-community.md)

<sub>*This page is: Copyright © 2025 MariaDB. All rights reserved.*</sub>

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