Abergwili is a village and community in Carmarthenshire, Wales, near the confluence of the rivers Towy and Gwili, close to the town of Carmarthen. It is also an electoral ward. Named after the village of Abergwili, the community includes the settlements of Peniel, Llanfihangel-uwch-Gwili and White Mill. The grounds of the former Bishop's Palace are listed on the Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales.

The Gwili Railway is a Welsh heritage railway, that operates a preserved standard gauge railway line from the site of Abergwili Junction in southwest Wales along a four-and-a-half-mile (7.2 km) section of the former Carmarthen to Aberystwyth line. The original railway closed in 1965, with the track being lifted in 1975.