Mullingar is the county town of County Westmeath in Ireland. It is the third most populous town in the Midland Region, with a population of 22,667 in the 2022 census. The Counties of Meath and Westmeath Act 1543 proclaimed Westmeath a county, separating it from Meath. Mullingar became the administrative centre for County Westmeath. The town was originally named Maelblatha, and takes its modern name from a mill noted in the legend of Colman of Mullingar.