Directions to Regional Municipality of York Directions to Regional Municipality of York Search | Advanced Search | New Members | Coupons and Discounts | All Categories Government & Education >> Government - Municipal Regional Municipality of York 17250 Yonge StreetNewmarket, ON L3Y 6Z1 | View on Google Maps Ms. Diane Chase (905) 830-4444 | 4375227594 | fax: (905) 895-3482 Visit Site Get directions to: Regional Municipality of York, 17250 Yonge Street, Newmarket ON Get directions from: Click to Print This Page If your business isn't here, contact us today to get listed!