Linden is a city in Cass County, Texas, United States. The population was 2,256 at the 2000 census. It is the county seat of Cass County. According to the United States Census Bureau, the city has a total area of 3.5square miles (9.1Square kilometers), all of it land. As of the census of 2000, there were 2,256people, 940households, and 579families residing in the city. The population density was 640.4people per square mile (247.5Square kilometers). There were 1,048 housing units at an average density of 297.5per square mile (115.0Square kilometers).