Porto and Houston
Comparison by area and population

Porto

Portugal

Houston

United States

Population

221 800
 (2008)

221 800
(2008)

2 100 263
(2010)
2 100 263
 (2010)

Area

42 km2

42 km2

965 km2
965 km2

Population density

5 280.95
/km2

5 280.95/km2

2 176.44/km2
2 176.44
 /km2
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