La Vallée-de-l'Or (French pronunciation: [la vale də lɔʁ]) is a regional county municipality in the Abitibi-Témiscamingue region in Northwestern Quebec, Canada.

It is named for its gold deposits in the Harricana River and Bell River valleys.

Originally part of Abitibi RCM, it was created in April 1981 as Vallée-de-l'Or Regional County Municipality.

The name, adjusted to La Vallée-de-l'Or on October 11, 2003, means "The Valley of Gold" and refers to the area at the sources of the Harricana River where the Abitibi gold rush took place in the 1930s.

Highways and numbered routes that run through the municipality, including external routes that start or finish at the county border:[9]