Chillicothe, TX has a population of 876 and is the 15,981st largest city in the United States. The population density is 858 per sq mi which is 785% higher than the Texas average and 847% higher than the national average. The median age in Chillicothe is 44 which is approximately 29% higher than the Texas average of 34. In Chillicothe, 59% of the population over 15 years of age are married, 66% speak English and 32% speak Spanish. 69% of Chillicothe residents were born in Texas, 12% were born out of state, 1% were born outside of the United States and 17% were foreign born.