De Kalb is a city in Bowie County, Texas, United States. The population was 1,769 at the 2000 census. It is part of the Texarkana, Texas - Texarkana, Arkansas Metropolitan Statistical Area. Its two area codes are 430 and 903. Its zipcode is 75559. It is in the Central Time Zone. De Kalb apartments for rent comparison page shows most up to date rent information on De Kalb apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.