<P> New York City, Chicago, and Philadelphia are the only incorporated places in the United States that have a population over 1,000,000 and a population density over 10,000 people per square mile . </P> <Table> <Tr> <Th> Population </Th> <Th> 10,000 + incorporated places </Th> </Tr> <Tr> <Td> 1,000,000 + </Td> <Td> </Td> </Tr> <Tr> <Td> 100,000--999,999 </Td> <Td> 14 </Td> </Tr> <Tr> <Td> 50,000--99,999 </Td> <Td> 29 </Td> </Tr> <Tr> <Td> 10,000--49,999 </Td> <Td> 48 </Td> </Tr> <Tr> <Td> 1,000--9,999 </Td> <Td> 26 </Td> </Tr> <Tr> <Td> 0--999 </Td> <Td> 5 </Td> </Tr> </Table> <Tr> <Th> Population </Th> <Th> 10,000 + incorporated places </Th> </Tr> <Tr> <Td> 1,000,000 + </Td> <Td> </Td> </Tr>

Which part of usa is very thickly populated