Llanilar is a village in Ceredigion, Wales, about 4 kilometers (2.5 mi) southeast of Aberystwyth. It is the eponym of the hundred of Ilar. The population at the 2011 census was 1,085.
In Welsh placenames, many smaller communities are named for their parish (llan), having grown up around the local church. This town's name honors its patron saint, although it is disputed whether that is the church's presumed founder Ilar (Welsh for "Hilary"), listed as a member of Cadfan's mission and a martyr but now almost totally forgotten, or the more famous Hilary who was bishop of Poitiers in France and is still celebrated by the Anglican and Catholic churches in Wales. (The confusion is not helped by Edward Williams's numerous forgeries which he included in the Iolo Manuscripts.)
There is a Roman site just to the east. The present village was built along the southern side of the scenic River Ystwyth and contains a parish church, Nonconformist chapel, primary school, GP Surgery, and garage. Unfortunately, the village post office is now closed but a mobile van visits several times during the week.