De Kalb is a city in Bowie County, Texas, United States. The population was 1,699 at the 2010 census. It is part of the Texarkana, Texas – Texarkana, Arkansas Metropolitan Statistical Area. Its two area codes are 430 and 903. Its ZIP code is 75559. It is in the Central Time Zone.GeographyDe Kalb is located at .According to the United States Census Bureau, the city has a total area of 1.3sqmi, all of it land.DemographicsAs of the census of 2000, there were 1,769 people, 725 households, and 477 families residing in the city. The population density was 1,349.1 people per square mile (521.4/km²). There were 853 housing units at an average density of 650.5 per square mile (251.4/km²). The racial makeup of the city was 66.70% White, 30.81% African American, 0.57% Native American, 0.06% Asian, 0.68% from other races, and 1.19% from two or more races. Hispanic or Latino of any race were 2.43% of the population.
