Hornsby, TN has a population of 271 and is the 23,002nd largest city in the United States. The population density is 258 per sq mi which is 68% higher than the Tennessee average and 184% higher than the national average. The median age in Hornsby is 37 which is approximately 4% lower than the Tennessee average of 39. In Hornsby, 61% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 85% of Hornsby residents were born in Tennessee, 14% were born out of state, 0% were born outside of the United States and 0% were foreign born.