<P> The 2009 estimated population for the city proper was approximately 8.84 million people , with a land area of 1,485 square kilometres ( 573 sq mi ) . According to the most recent definition agreed upon by the federal and state governments , the Greater Mexico City population is 21.3 million people , making it the largest metropolitan area of the Western Hemisphere , the tenth - largest agglomeration , and the largest Spanish - speaking city in the world . </P>
<P> The 2009 estimated population for the city proper was approximately 8.84 million people , with a land area of 1,485 square kilometres ( 573 sq mi ) . According to the most recent definition agreed upon by the federal and state governments , the Greater Mexico City population is 21.3 million people , making it the largest metropolitan area of the Western Hemisphere , the tenth - largest agglomeration , and the largest Spanish - speaking city in the world . </P>
where does mexico city rank among the world 's largest cities
where does mexico city rank among the world 's largest cities
tenth - largest agglomeration
tenth - largest agglomeration