The South West region of the country is one of the highest populated regions in the country after Dublin. Over 597,000 people are currently living in the region. 20-24 year olds represent the largest number of that figure with over 47,000 people resident in the South West. Nationally Ireland is experiencing a population boom. CSO figures estimate just over 4 million people living here, the highest figure since 1871. Gerry O Hanlon from the CSO says there is a number of reasons for this.