Richardson is a city in Dallas and Collin counties in the U.S. state of Texas. As of the 2020 United States census, the city had a total popu…Richardson is a city in Dallas and Collin counties in the U.S. state of Texas. As of the 2020 United States census, the city had a total population of 119,469. Richardson is an inner suburb of the city of Dallas and is part of the Mid-Cities region of the Dallas–Fort Worth metroplex.
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