Ruis can mean:
- Ruis (letter), a letter of the Ogham alphabet
- Ruis, Switzerland, a kreis in Switzerland
- the municipality of Rueun in Switzerland, formerly known as Ruis
- Rye, which translates to "ruis" in the Finnish language
- RUIS acronym of Revolutionary Union for Internationalist Solidarity, an anarchist militia in the Syrian Civil War.
This disambiguation page lists articles associated with the title Ruis.
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