The A489, officially known as the Newtown to Machynlleth Trunk Road in Wales, is a trunk road in the United Kingdom running from Craven Arms, Shropshire to Machynlleth, Powys and crossing the Wales-England border.

A489
Route information
Maintained by North & Mid Wales Trunk Road Agency
Major junctions
East end	Craven Arms
Major intersections	A49 A488 A490 A483 A470 A487
West end	Machynlleth
Location
Country	United Kingdom
Constituent country	Wales
Primary destinations	Newtown
Road network
Roads in the United Kingdom Motorways A and B road zones

The road starts about one mile north of Craven Arms. From here it travels through Lydham, Churchstoke, Newtown, Caersws, Cemmaes Road and Machynlleth.

Between Caersws and Cemmaes Road, the road appears to 'disappear', where it is travelling with the A470, which takes priority. The same happens in Lydham, albeit for a much shorter distance, where the A488 takes priority.

A new section of road, the Newtown Bypass, was completed in 2019.^[1]