County Offaly population. It is the largest county by area and the third largest by population in the Midlands. Lusmagh Tullamore is the county town and largest town in Offaly and is the 30th largest in Ireland. Offaly borders seven counties: Galway, Roscommon, Tipperary, Laois, Westmeath, Kildare and Meath. The Slieve Bloom Mountains are in the southern part of the county on the border with County Laois. Offaly has the 24th highest county peak in Ireland. The highest point is Arderin () in the Slieve Blooms at . The Slieve Bloom Mountains contain the county's highest points including Stillbrook Hill and Wolftrap
Midlands Gateway Offaly and County Westmeath. The neighbouring counties are County Cavan, County Laois, County Longford, County Meath, County Monaghan, County Roscommon, and nearby Ulster counties. The principle urban centres concerned with the Midlands Gateway are Athlone, Tullamore and Mullingar. The proposed combined County council strategy aspires to provide the basis for the development of a world class, knowledge-based and competitive gateway. The strategy is designed to create an integrated linked Gateway comprising Athlone, Tullamore and Mullingar together with the other surrounding towns in the region with the objective of developing internationally competitive Gateway. The designation and development of the Midlands gateway