<page_title> Oeiras, Portugal </page_title> <section_title> Demographics </section_title> <table> <cell> 2011 <col_header> Population of the municipality of Oeiras (1849 - 2011) </col_header> <col_header> Year </col_header> <col_header> 1801 </col_header> <col_header> 1849 </col_header> <col_header> 1900 </col_header> <col_header> 1930 </col_header> <col_header> 1960 </col_header> <col_header> 1981 </col_header> <col_header> 1991 </col_header> <col_header> 2001 </col_header> </cell> <cell> 172,120 <col_header> Population of the municipality of Oeiras (1849 - 2011) </col_header> <col_header> Pop. </col_header> <row_header> 2011 </row_header> </cell> </table>
In 2011, the population of Oerias was 172,120, making it the fifth-most densley populated municipality in Portugal.