Grințieș is a commune in Neamț County, Western Moldavia, Romania.

Grințieș is situated in the central part of the Eastern Romanian Carpathians, between the Bistrița Mountains and the Ceahlău Massif.

It lies on the banks of the Bistricioara, close to where the river joins the Bistrița, at the upper end of Lake Izvorul Muntelui (also known as Lake Bicaz).

The commune is traversed by National Road DN15 [ro], which connects Piatra Neamț with the city of Toplița in Harghita County.

The All Saints' Day wooden church of Grințieș [ro] dates from 1793.