Glenfarg (Scottish Gaelic: Gleann Fairg) is a village in the Ochil Hills in Perth and Kinross, Scotland.

The former railway line is now the route of the M90 motorway, which runs along the eastern periphery of the village.

This project also won two awards at the Scottish Water Awards 2009 "Delivering through Partnership" and "Outperforming the Capital Programme" It is the source of the River Farg which on one occasion was badly polluted in May 2014, when an employee at the Glenfarg Water Treatment Works at East Blair Farm left a valve open, allowing water to flow into the aluminium sulphate tank.

That tank then overflowed, flooding a corridor and draining into the River Farg over a period of several hours.

[citation needed] The village and its surrounding hamlets—including Duncrievie—is governed by Glenfarg Community Council.