Gallaway, TN has a population of 948 and is the 15,466th largest city in the United States. The population density is 152 per sq mi which is 1% lower than the Tennessee average and 67% higher than the national average. The median age in Gallaway is 37 which is approximately 4% lower than the Tennessee average of 39. In Gallaway, 52% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 85% of Gallaway residents were born in Tennessee, 15% were born out of state, 0% were born outside of the United States and 0% were foreign born.