It administers ten villages: Aurel Vlaicu (until 1925 Binținți; Bencenc), Băcâia (Bakonya), Bozeș (Bózes), Cigmău (Csigmó), Gelmar (Gyalmár), Geoagiu-Băi (Feredőgyógy), Homorod (Homoród), Mermezeu-Văleni (Nyírmező), Renghet (Renget), and Văleni (Valény).The A1 motorway and the national road DN7 (which link Bucharest with the Banat region, in western Romania) pass though the southern side of the town.The name of Germisara meant "hot water" (germi = "heat", sara = "waterfall") and it showed that the Dacians already knew of the thermal springs of the area.But more probably, the name is coming from the Hungarian word dió (nut as fruit) with the suffix -d, so, after the first documentary citation, "villa Gyog" from 1291 appeared as Dyod és Dyog (1397), Aldyogh (1407), Algyogh (1412), Aldyod (1439), Alsodyod alio nomine Alsoffalwa (around 1444).The first documentary citation of Geoagiu (it was written as "villa Gyog") was in the year 1291, when it was used as a land in the vicinity of Binținți (now the village Aurel Vlaicu).