According to 2015 census estimates, half of the US population lives in these 143 counties (ranked by population): Los Angeles County, California Cook County, Illinois Harris County, Texas Maricopa ...

Across the US, county vaccination rates range from 0.1% to nearly 100%. The interactive map below shows the most and least vaccinated counties in each state. Hover over a county to see its ...

For every county in the United States, the map below shows information on all the animals and plants protected under the U.S. Endangered Species Act as threatened or endangered. To see the number of ...

Three wildfires were raging Wednesday, Jan. 8, forcing evacuations and threatening homes in Los Angeles County.