Troy is a town in Obion County, Tennessee, United States. The population was 1,273 at the 2000 census. It is part of the Union City, TN–KY Micropolitan Statistical Area.
According to the United States Census Bureau, Troy has a total area of 1.4 square miles (3.7 km²), all of it land.
As of the census of 2000, there were 1,273 people, 533 households, and 367 families residing in the town. The population density was 896.7 people per square mile (346.1/km²). There were 576 housing units at an average density of 405.7 per square mile (156.6/km²). The racial makeup of the town was 98.35% White, 1.26% African American, 0.16% from other races, and 0.24% from two or more races. Hispanic or Latino of any race were 1.26% of the population.