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Arachthos (Greek: Άραχθος) is a former municipality in the Arta regional unit, Epirus, Greece. Since the 2011 local government reform it is part of the municipality Nikolaos Skoufas, of which it is a municipal unit.[1] It is situated along the lower course of the river Arachthos, south of Arta. Population 6,011 (2001). The seat of the municipality was in Neochori.

Near Arachthos, there is the static inverter plant of HVDC Italy-Greece.

Division of the municipality

Neochorion / Δ.δ. Νεοχωρίου -- το Νεοχώριον [ 2207 ]
Agia Paraskevi / Δ.δ. Αγίας Παρασκευής [ 1267 ]
- Agia Paraskevi / η Αγία Παρασκευή [ 687 ]
- Anthotopos / ο Ανθότοπος [ 295 ]
- Kalomodia / τα Καλομόδια [ 285 ]
Akropotamia / Δ.δ. Ακροποταμιάς -- η Ακροποταμιά [ 547 ]
Loutrotopos / Δ.δ. Λουτροτόπου [ 408 ]
- Loutrotopos / ο Λουτρότοπος [ 55 ]
- Neos Synoikismos Loutrotopou / ο Νέος Συνοικισμός Λουτροτόπου [ 353 ]
Pachykalamos / Δ.δ. Παχυκαλάμου -- ο Παχυκάλαμος [ 607 ]
Peranthi / Δ.δ. Περάνθης -- η Περάνθη [ 388 ]
Sykies / Δ.δ. Συκεών -- οι Συκιές [ 587 ]