McKenzie, TN has a population of 5,650 and is the 5,981st largest city in the United States. The population density is 894 per sq mi which is 484% higher than the Tennessee average and 887% higher than the national average. The median age in McKenzie is 39 which is approximately equal to the Tennessee average of 39. In McKenzie, 50% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 68% of McKenzie residents were born in Tennessee, 28% were born out of state, 1% were born outside of the United States and 3% were foreign born.