 About 1.4% of families and 1.9% of the population were below the poverty line, including 1.9% of those under age 18 and 5.7% of those age 65 or over.Coppell experiences a humid subtropical climate.In the United States Energy Environment Administration's "Monthly Energy Review, April 2016", Coppell was ranked number 3 (for cities 30,000+ residents) in the United States for the number of trees per resident (2.5 trees per resident), slightly behind Sacramento, California (2.6