Legislative size (voting members)

Constitution of Ireland 1999-05-27  (last amended: 2012-06-27)

Official Webpage, Houses of the Oireachtas: 

Article 16.

2° The number of members shall from time to time be fixed by law, but the total number of members of Dáil Éireann shall not be fixed at less than one member for each thirty thousand of the population, or at more than one member for each twenty thousand of the population.

Under the Constitution there must be at least one Member for every 20,000 to 30,000 people and following the 2011 elections there were 166 Members representing 43 constituencies.