The A497 road is a non-primary road on the Llŷn peninsula in Gwynedd, north-west Wales.
The eastern terminus is a roundabout with the A487 in Porthmadog (52°55′40″N 4°08′00″W / 52.9278°N 4.1334°W / 52.9278; -4.1334 (A497 road (eastern end))). It runs west along the Cambrian Coast to Pwllheli then north to its western terminus at Nefyn (52°56′07″N 4°31′12″W / 52.9354°N 4.5201°W / 52.9354; -4.5201 (A497 road (western end))).
Substantial improvements have been made to the A497 between Abererch, a mile or so east of Pwllheli and Llanystumdwy, a mile west of Criccieth. The new stretch of road has vastly improved access, especially for larger vehicles, to the Llŷn peninsula from the south.
Coordinates: 52°54′35″N 4°19′51″W / 52.9098°N 4.3308°W / 52.9098; -4.3308 (A497 road)