 The City of Richardson is a voluntary member of the North Central Texas Council of Governments (NCTCOG) association, the purpose of which is to coordinate individual and collective local governments and facilitate regional solutions, eliminate unnecessary duplication, and enable joint decisions.As of the 2015 American Community Survey, there were 106,123 people, 40,020 households, and 27,327 families residing in the city.The population density was 3,213.9 people per square mile (1,241.1/km2).