Mountrath is a small town in County Laois, Ireland. The town lies on the R445 midway between Dublin and Limerick, exactly 96.5 km (60 mi) from both cities. The town was bypassed by the M7 motorway in 2010 leading to a significant easing of traffic congestion in the town.

County Laois is a county in Ireland. It is part of the Eastern and Midland Region and in the province of Leinster. It was known as Queen's County from 1556 to 1922. The modern county takes its name from Loígis, a medieval kingdom. Historically, it has also been known as County Leix.