* Cents per litre (CPL) prices are estimated and rounded to within one decimal place
Monaghan in Ulster is the 4th smallest county in the Republic with a population of around 61,273. Towns and villages in Monaghan include Ballybay, Carrickmacross, Castleblayney, Clones, Emyvale, Glaslough, Iniskeen, Monaghan and Rockcorry.