Bontnewydd (Welsh for 'new bridge'; standardised as Y Bontnewydd) is a small village and community with a population of 1,162 located on the A487 road 1+2⁄3 miles (2.7 km) south of Caernarfon in Gwynedd, Wales, close to the river Gwyrfai, 2 miles (3.2 km) from its outflow into Foryd Bay.

The village has one small supermarket, an outdoor attraction called Gypsy Wood Park, a pub called The Newborough Arms and one school.

According to the 2011 Census, Bontnewydd is the community with the 3rd highest percentage of Welsh speakers in Wales.

[3] Since 1995 Bontnewydd has also formed an electoral ward, represented by a county councillor on Gwynedd Council.

The village is the location of Plas Dinas, the ancestral family home of Antony Armstrong-Jones, 1st Earl of Snowdon, the husband of Princess Margaret.