<Li> Western Air Defense Sector, 1 January 1995--present </Li> <P> According to the United States Census Bureau, it has a total area of 15.0 km2 (5.8 mi2). 15.0 km2 (5.8 mi2) of it is land and none of the area is covered with water . </P> <P> It is located adjacent to Lakewood, about one mile south of Tacoma and 40 miles south of Seattle . It was named in honor of Colonel William Caldwell McChord, former Chief of the Training and Operations Division in HQ Army Air Corps . Much of the base is a census - designated place (CDP), which had a population of 4,096 at the 2000 census . </P> <Table> <Tr> <Th_colspan="4"> Historical population </Th> </Tr> <Tr> <Th> Census </Th> <Th> Pop . </Th> <Th> </Th> <Th>% ± </Th> </Tr> <Tr> <Td> </Td> <Td> 4,538 </Td> <Td> </Td> <Td>--</Td> </Tr> <Tr> <Td> 2000 </Td> <Td> 4,096 </Td> <Td> </Td> <Td> − 9.7% </Td> </Tr> <Tr> <Td> Est. 2007 </Td> <Td> 4,351 </Td> <Td> </Td> <Td> </Td> </Tr> </Table>

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