San Nicolò Gerrei reaches 370 metres in altitude, in an area rich in plateaus, south of the river Flumendosa. Populated by 800 inhabitants, San Nicolò Gerrei is the main town in the territory from which derives its name, inhabited since the Neolithic period and with traces of well-established settlements in Carthaginian and Roman times. Farming and mining are the main sources of income, along with the cultivation of grains and vines. The name of the village also comes from the patron saint, Nicola, celebrated twice a year, in mid-May and early December. The existence of the current inhabited area is attested by documentary sources from the 13th century, it being referred to as Padule (or Pauli), names which remained in use until 1863. It derives from the Latin palus, with the inhabited area arising in a basin subject to stagnation and containing numerous springs.