List of highways numbered 660

Route 660, or Highway 660, may refer to:

Canada

 * Saskatchewan Rural Municipal Route.svg Saskatchewan Highway 660

Ireland

 * R660 Regional Route Shield Ireland.png R660 road (Ireland)

United Kingdom

 * UK road A660.svg A660 road

United States

 * Nevada_660.svg Nevada State Route 660 (former)
 * OH-660.svg Ohio State Route 660
 * PA-660.svg Pennsylvania Route 660
 * Ellipse sign 660.svg Puerto Rico Highway 660