Metropolitan counties are large urban areas that encompass a city and its surrounding suburbs. They are typically characterized by a high population density and significant economic activity. These counties often provide essential services such as education, transportation, and public safety to their residents. In many countries, metropolitan counties are governed by local authorities that coordinate services across the region. They may include various municipalities and townships, working together to address issues like housing, infrastructure, and public health. Examples of metropolitan counties can be found in regions like Los Angeles County in California and Cook County in Illinois.