Williamsville

Canada

 * Williamsville (Ontario) - see Kingston (Ontario)

Côte D'Ivoire

 * Williamsville (Cote D'Ivoire)

Ireland

 * Williamsville (Ireland) - see Dublin, Ireland

Trinidad and Tobago

 * Williamsville (Trinidad and Tobago)

United States of America

 * Williamsville (Illinois)
 * Williamsville (Missouri)
 * Williamsville (Nevada) (Ragtown)
 * Williamsville (New York) - see Amherst (New York), Buffalo
 * Williamsville (Vermont)
 * Williamsville (Virginia)