The commune is composed of nine villages: Bisericani (Székelyszentlélek), Bulgăreni (Bogárfalva), Firtușu (Firtosváralja), Lupeni, Morăreni (Nyikómalomfalva), Păltiniș (Kecset), Păuleni (Székelypálfalva), Satu Mic (Kecsetkisfalud), and Sâncel (Szencsed).

Lupeni is located in the southwestern part of the county, 13 km (8.1 mi) northwest of Odorheiu Secuiesc, on the road to Corund and Sovata.

The usually small Feernic stream became so swollen in the catastrophic floods of 2005 when 11 cm (4.3 in) of rain fell in the space of two hours, that three people lost their lives when they were swept away as the water rose over four meters.

The territory of Northern Transylvania remained under Soviet military administration until 9 March 1945, after which it became again part of Romania.

[8] Lupeni is the birthplace of the famous Hungarian writer Áron Tamási (1897–1966), known for such works as Címeresek and the Ábel trilogy.