There are 142 Post Offices in Dallas County, Texas, serving a population of 2,552,213 people in an area of 873 square miles. There is 1 Post Office per 17,973 people, and 1 Post Office per 6 square miles.
In Texas, Dallas County is ranked 247th of 254 counties in Post Offices per capita, and 1st of 254 counties in Post Offices per square mile.