<page_title> List of Welsh principal areas by population </page_title> <table> <cell> Cardiff <col_header> District </col_header> </cell> <cell> 2 <col_header> Rank </col_header> </cell> <cell> Swansea <col_header> District </col_header> </cell> </table>
Swansea is the second most populous area in Wales, after Cardiff.