Mountmellick (pop. 3,400) is a town in the north of County Laois in the Republic of Ireland. It was a significant industrial town before the Famine of the mid-19th century., when it was known as "little Manchester". This was partly thanks to the Grand Canal, which flowed through Mountmellick. Mountmellick embroidery, also known as Mountmellick Lace, became one of the most popular forms of needlework during the 19th century. Mountmellick Museum displays original pieces of Mountmellick Work.

Mountmellick was a major centre of Quaker settlement in Ireland, and at the time of the Famine had 8,000 people. Famous families who left at this time include Pims, Bewleys and Dennys. There is still a Quaker population in the town, and a Quaker meeting house. The town has numerous examples of Georgian architecture and one of the finest examples of a Georgian square in Ireland.

The town is also known for its Christmas Tree, the biggest in Europe and the second biggest in the world.

The town has a Town Council, comprising nine members, six from Fianna Fail and three from Fine Gael. There are three primary schools(St.Josephs girl school and St. Patricks boy school are part of the one building on Davitt Road, The Rock N.S. one mile out the Dublin road) the town and a Community College(located in the centre of the town opposite the square). The main industries are agriculture, light industry and brewing.

See also: List of towns in the Republic of Ireland