Mullingar ( mul-in-GAR; Irish: An Muileann gCearr, meaning 'the left-hand mill' [ən̪ˠ ˌmˠɪlʲən̪ˠ ˈɟɑːɾˠ]) 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.
Traditionally a market town serving the surrounding agricultural hinterland, Mullingar's cattle market closed in 2003 for the development of a mixed commercial and residential scheme called Market Point.
Mullingar has a number of neighbouring lakes, including Lough Owel, Lough Ennell and Lough Derravaragh. Lough Derravaragh is also known for its connection with the Irish legend of the Children of Lir. The town of Mullingar is linked to Lough Ennell via Lacy's Canal and the River Brosna. Another nearby waterway is the Royal Canal, which loops around Mullingar.
