Abersoch is a village in the community of Llanengan in Gwynedd, Wales. It is a popular coastal seaside resort, with around 2,600 residents, on the east-facing south coast of the Llŷn Peninsula at the southern terminus of the A499. It is about 7 miles (11 km) south-west of Pwllheli and 27 miles (43 km) south-west of the county town of Caernarfon.

The Llŷn Peninsula extends 30 miles (50 km) into the Irish Sea from North West Wales, south west of the Isle of Anglesey. It is part of the historic county of Caernarfonshire, and historic region and local authority area of Gwynedd. Much of the eastern part of the peninsula, around Criccieth, may be regarded as part of Eifionydd rather than Llŷn, although the boundary is somewhat vague. The area of Llŷn is about 400 km2 (150 sq mi), and its population is at least 20,000.