Llwchwr is a community in the central western part of the City and County of Swansea, Wales, UK. It lies some 9 km (5.5 miles) west-north-west of Swansea city centre and is bounded by the communities of Gorseinon to the north, Penllergaer to the east, and Gowerton to the south, as well as by the estuary of the River Loughor to the west, on the far side of which lies Bynea in Carmarthenshire, connected to Llwchwr by road and rail bridges.
The community, which has its own community council, Llwchwr Town Council, comprising the town of Loughor and the adjacent village of Kingsbridge, (The south east of the town of Gorseinon), plus Llewitha and is divided for electoral purposes into the community wards of Garden Village, Kingsbridge, Lower Loughor and Upper Loughor. From 1974 to 1996 Llwchwr formed part of the Lliw Valley district of the county of West Glamorgan. It also includes the southern suburbs of Gorseinon town and Garden Village.
The community is home to Garden Village FC of the Welsh Football League, Carmarthenshire League Division 2 outfit Loughor Rovers, and Loughor RFC who play in ASDA Nation League Division 1 West.