Williamsville is the name of some places:
- United States of America
- Williamsville, Illinois
- Williamsville, Missouri
- Williamsville, Nevada (Ragtown)
- Williamsville, New York
- Williamsville, Vermont
- Williamsville, Virginia
- Other
- Williamsville, Trinidad and Tobago
- Williamsville, Cote D'Ivoire
- Williamsville, Dublin, Ireland