List of York Region Transit and Viva bus routes

This is a list of York Region Transit and Viva Rapid Transit bus routes in York Region, north of Toronto, Canada. The routes are divided into branch routes.

Routes
Route information effective.

Numbering Conventions

 * 1 to 199 — Regular bus (including TTC contracted routes)
 * 300 series — Express
 * 400 series — High School Specials
 * 500 series — Community Bus
 * 600 series — Viva (used internally)

Separate routes with duplicate names are distinguished by showing cardinal directions in brackets for the portions of the streets each serves.