* France (obviously!)
* Belgium (along with Dutch and German)
* Switzerland (along with German, Italian, and Romansh)
* Luxembourg (along with German)
* Monaco
* Andorra (along with Catalan)
It's also worth noting that French is spoken by a significant portion of the population in other European countries, such as:
* Italy (especially in the Aosta Valley)
* Spain (especially in Catalonia and the Basque Country)
* Germany (in regions bordering France)
* United Kingdom (especially in the Channel Islands)
While not an official language in these countries, French has a historical and cultural presence, and it's often taught in schools and used in some professional settings.