Historic Counties Institute

Geography • Identity • Continuity

Reference, evidence, and public education for the historic counties.

Historic counties are the enduring geography. Councils are administration, lieutenancies are ceremonial – neither define the counties.

County Dossier

Laois

A midland county of upland edges and central routes.

Laois lies in the central midlands, rising south-westward into the Slieve Bloom Mountains while opening out into lower farmland and bogland beyond.

Laois county reference map

At a glance

Laois at a glance

A midland county of upland edges and central routes.

Nation Ireland
Formal name County Laois
Foundation 1556
  • Formed from Gaelic Loígis territory
  • Ancient Loígis and O'More country
  • Timahoe Round Tower built 12th Century
  • Area: 660 sq miles / 1,709 km²
  • Population: 80,559
  • County Top: Arderin (1,729ft / 527m)

County Geography

Laois meets Offaly to the west and north-west, Kildare to the north-east, Carlow to the east and south-east, Kilkenny to the south, and Tipperary to the south-west. The county is shaped by the Slieve Bloom Mountains, the spread of the central plain, and the transition from river valleys to bog-edge country.

Laois is easy to recognise through Slieve Bloom, the midland plain, and the bog-edge country.

Map Reference

View Laois on the map

Laois is the county. The map shows its boundary, places, and neighbouring counties.

Open Laois in the Interactive Map

Places and routes

Portlaoise, Abbeyleix, Mountmellick, Mountrath, and Portarlington show the county from its central plain and Slieve Bloom side to its northern and eastern approaches.

Connections

The county’s routes have long crossed the plain through Portlaoise and Abbeyleix, run north-west toward Mountmellick and Portarlington, and turn south-west toward Mountrath and the Slieve Bloom side. Movement follows the same plain, bog-edge, and upland pattern.

Laois landscape or key location
Timahoe Round Tower, County Laois.

Names

  • Laois
  • County Laois
  • County of Laois

Laois is the county name restored from the older Irish form. County Laois is the formal historical style, the older historical background lies in Loígis and the O’More country, and the Laois name ultimately outlasted the later title Queen’s County.

Laois was shired in the sixteenth century, and its central position between plain, upland, and route corridor has kept the historic county geographically clear ever since.

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County Reference

Explore Laois

Open the map to explore Laois, or return to the county index to browse other counties.