Waunarlwydd (Welsh for 'the lord's meadow'; arlwydd is a local variant of arglwydd) is a village and community in Swansea, Wales, within the newly formed Waunarlwydd ward in 2021. Waunarlwydd became a community in 2022.

Buses are provided by First Cymru: these are the 15 or 16 Swansea - Waunarlwydd and Swansea - Gorseinon.

The main road in and out of the village is the B4295. The nearest motorway junction is 47 Swansea West (Penllergaer) on the M4.

The original main road from Swansea was Waunarlwydd Road, which starts from Cockett Road (A4216) at the Cockett Inn pub and runs to the meeting point of Cwmbach Road and Swansea Road at the old Lamb & Flag pub.

Although the West Wales Line runs through the village, there is no actual railway station: the nearest is Gowerton.

Waunarlwydd was the home of an aluminium rolling operation owned by US company Alcoa. Alcoa announced in November 2006 that it would close the plant by the end of March 2007, with the loss of 298 jobs. Decommissioning works are now taking place, while a small workforce is still employed in homogenisation^{[clarification needed]}, where heat treatment takes place for the Kitts Green plant.

TIMET, the world's largest supplier of titanium metals, is now the major employer in the village, with the mill one of four European locations.

There are 3 nursing homes: Ashgrove House, Tŷ Waunarlwydd and Tŷ Victoria.