DeCordova, TX has a population of 2,794 and is the 9,161st largest city in the United States. The population density is 1,983 per sq mi which is 1946% higher than the Texas average and 2089% higher than the national average. The median age in DeCordova is 61 which is approximately 78% higher than the Texas average of 34. In DeCordova, 85% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 65% of DeCordova residents were born in Texas, 33% were born out of state, 0% were born outside of the United States and 1% were foreign born.