A Washington, D.C.-based think tank  has been crunching numbers to find out which U.S. metropolitan areas have the largest and the smallest concentrations of working moms, whose children are under the age of 18.
According to the Creative Class Group , among the U.S. metro areas with a million+ population, the metro areas with the largest groups of working moms are: Minneapolis with 73 percent of moms working, Buffalo (NY) with 70.7 percent and St. Louis with 70.6 percent. The three large metro areas with the lowest concentration of working moms: Riverside (CA) with 56.5 percent, San Jose with 57.7 percent and Los Angeles with 57.8 percent. For a detailed breakdown, go to the web site . (June 2007)