The Historical Process of the Formation of Valea Ierii Commune

Valea Ierii was officially documented in 1840.

The village of Valea Ierii does not appear on the Josephine Map of Transylvania from 1769–1773 (section 094).

In the Sematism of 1900 (page 366), the locality appears under its current name but as part of the village of Hașdate.

The commune of Valea Ierii was formed in its current structure in 1925, following the administrative reform, with its three villages: Valea Ierii, Plopi, and Cerc. The commune was part of Turda County. The village of Valea Ierii was initially a hamlet of Hașdate village, in Turda County. In 1784, it became part of Cluj County (Săvădisla), until 1876–1877 when it was reintegrated into Turda-Arieș County.

Plopi village was documented in 1848 and followed the same administrative evolution as the main village.

Cerc village was a hamlet of Finisel and was included in the commune in 1925.