Saint Arnaud, the French for Saint Arnold, is the name of the following places:
- Saint Arnaud, Victoria, a town in Australia
- Saint Arnaud, New Zealand, a town in New Zealand's South Island
- The Saint Arnaud Range, also in New Zealand's South Island
The above localities are named after French marshal Jacques Leroy de Saint Arnaud.
- El Eulma, a city in Algeria, was also formerly known as Saint Arnaud.
