Oakland County in Metro <answer>Detroit</answer>, once rated amongst the wealthiest US counties per household, is no longer shown in the top 25 listing of Forbes magazine. But internal county statistical methods – based on measuring per capita income for counties with more than one million residents – show that Oakland is still within the top 12, slipping from the 4th-most affluent such county in the U.S. in 2004 to 11th-most affluent in 2009. <answer>Detroit</answer> dominates Wayne County, which has an average household income of about $38,000, compared to Oakland County's $62,000.
What city dominates Wayne County?
Detroit