Originally a market town with surrounding urban villages, Wrexham has now coalesced with a number of urban villages and forms North Wales' largest conurbation, including its western and south western suburban villages. The conurbation including Wrexham, Rhosllannerchrugog, Coedpoeth and Llay built-up areas totals over 100,000 residents. The Office for National Statistics defines a Wrexham Built-Up Area (Pop. 65,592 in 2011) making it the 134th largest built up area in the UK, and the 4th largest in Wales. Wrexham is home to approximately 40% of the total population of the county borough.