Dallas County, Texas

Dallas County is a county in the U.S. state of Texas. In 2010, the population was 2,368,139. 
The head of the county and biggest city is Dallas. It is the second most populated county in Texas after Harris County. It is the ninth most populated in the whole United States.
Geography.
The county has a total area of 909 square miles.
Schools.
These school districts are in Dallas County: