What is the most segregated metropolitan area in the United States: Detroit, Milwaukee, Minneapolis or New York? They all are. It just depends on how you measure segregation. And there are lots of yardsticks to choose from. Researchers have devised at least 20 ways to measure residential segregation. That's great for sociologists who have months to write detailed articles for scholarly journals, but not for journalists who must pound out stories on deadline for a general audience.