Voluntarism can refer to:
- Voluntarism (action), the use of or reliance on voluntary action to maintain an institution, carry out a policy, or achieve an end.
- Voluntarism (metaphysics), a philosophical term emphasising the primacy of the will.
- Voluntaryism, the philosophical position that the only legitimate interactions between and among people are those freely assented to by all parties concerned.
- Volunteerism, the willingness of people to work on behalf of others without the expectation of pay or other tangible gain.