Manjaro (/mænˈdʒɑːroʊ/ man-JA-row) is a free and open-source Linux distribution based on the Arch Linux operating system with a focus on user-friendliness, accessibility, and improved software testing and stability compared to its upstream sources. It uses a rolling release update model with Pacman-derived package managers. Manjaro is developed mainly in Austria, France and Germany.

Reviewers often describe Manjaro Linux as a Linux distribution that is easy to set up and use, suitable for both beginners and experienced users. It is recommended as an easy and friendly way to install and maintain a cutting-edge Arch-derived distribution. Some reviewers find appeal in the large range of contributed software available in the Arch User Repository (AUR), which has a reputation for being kept up to date from upstream resources. Others highlight the wide selection of official and community editions with different desktop environments.

Manjaro was first released on 10 July 2011. By mid 2013, it was in the beta stage, though key elements of the final system had all been implemented, including a GUI installer (then an Antergos installer fork); a package manager (Pacman) with a choice of frontends; Pamac (GTK) for Xfce desktop and Octopi (Qt) for its Openbox edition; MHWD (Manjaro Hardware Detection, for detection of free & proprietary video drivers); and Manjaro Settings Manager (for system-wide settings, user management, and graphics driver installation and management).

GNOME Shell support was dropped with the release of version 0.8.3 in 2012. However, efforts within Arch Linux made it possible to restart the Cinnamon/GNOME edition as a community edition. An official release offering the GNOME desktop environment was reinstated in March 2017.

During the development of Manjaro 0.9.0 at the end of August 2015, the team decided to switch to year and month designations for Manjaro's version scheme instead of numbers. This applies to both the 0.8.x series as well as the new 0.9.x series—renaming 0.8.13, released in June 2015, as 15.06 and so on. Manjaro 15.09, codenamed Bellatrix and formerly known as 0.9.0, was released on 27 September 2015 with the new Calamares installer and updated packages.

In September 2017, Manjaro announced that support for i686 architecture would be dropped because "popularity of this architecture is decreasing". However, in November 2017 a semi-official community project "manjaro32", based on archlinux32, continued i686 support.

In September 2019, the Manjaro GmbH & Co. KG company was founded. It's FOSS website stated the company was formed '... to effectively engage in commercial agreements, form partnerships, and offer professional services'.

For x86-64 processors, Manjaro offers downloads configured with one of three desktops: