The Our (Luxembourgish: [ˈuːɐ̯] ⓘ; French: [uʁ] ⓘ, German: [ˈuːɐ̯]) is a river in Belgium, Luxembourg and Germany.

From the tripoint by the Europa Monument between Ouren (B), Sevenig (D) and Lieler (L) it runs almost entirely on the German-Luxembourg border until it reaches Wallendorf in Germany where it empties into the Sauer.

In its upper reaches between Germany and Belgium, the state border lies, as is normal on the thalweg of the river.

– Location of the confluences measured from the source of the Our – A comprehensive list that also includes the smaller tributaries is here.

It runs inter alia past Reuland Castle (Ouren) and the Europa Monument at the German-Belgian-Luxembourg tripoint.