De Kalb, TX has a population of 1,687 and is the 12,021st largest city in the United States. The population density is 1,232 per sq mi which is 1171% higher than the Texas average and 1260% higher than the national average. The median age in De Kalb is 44 which is approximately 28% higher than the Texas average of 34. In De Kalb, 57% of the population over 15 years of age are married, 93% speak English and 5% speak Spanish. 75% of De Kalb residents were born in Texas, 22% were born out of state, 0% were born outside of the United States and 3% were foreign born.