Location of Greenbrier, Tennessee
|• Total||6.6 sq mi (17.2 km2)|
|• Land||6.6 sq mi (17.1 km2)|
|• Water||0.0 sq mi (0.1 km2)|
|Elevation||853 ft (260 m)|
|• Density||748.3/sq mi (288.9/km2)|
|Time zone||Central (CST) (UTC-6)|
|• Summer (DST)||CDT (UTC-5)|
|GNIS feature ID||1286141|
Greenbrier is located at  According to the United States Census Bureau, the town has a total area of 6.6 square miles (17.2 km²), of which 6.6 square miles is land and 0.04 square mile (0.45%) is water.(36.427990, -86.800905).
As of the census of 2000, there were 4,490, 1,837 households, and 1,418 families residing in the town. The population density was 748.3 people per square mile (289.0/km²). There were 1,920 housing units at an average density of 290.9 per square mile (112.3/km²). The racial makeup of the town was 97.43% White, 0.67% African American, 0.22% Native American, 0.38% Asian, 0.49% from other races, and 0.81% from two or more races. Hispanic or Latino of any race were 1.28% of the population.
There were 1,837 households out of which 41.5% had children under the age of 18 living with them, 60.7% were married couples living together, 13.0% had a female householder with no husband present, and 22.8% were non-families. 18.9% of all households were made up of individuals and 6.8% had someone living alone who was 65 years of age or older. The average household size was 2.69 and the average family size was 3.06.
In the town the population was spread out with 28.6% under the age of 18, 9.6% from 18 to 24, 33.8% from 25 to 44, 18.7% from 45 to 64, and 9.3% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 94.7 males. For every 100 females age 18 and over, there were 89.0 males.
The median income for a household in the town was 32,568, and the median income for a family was $48,262. Males had a median income of $34,353 versus $23,523 for females. The per capita income for the town was $17,902. About 2.8% of families and 5.3% of the population were below the poverty line, including 5.4% of those under age 18 and 5.3% of those age 65 or over.
Greenbrier is well known for its annual Turning of the Pig celebration on July 3. It is a large barbecue festival benefitting the high school band program. This community wide event provides food, carnival games, live entertainment, local artisans, and good old fashioned family fun. Hundreds of pounds of pork are cooked on open pits during the festival and the pulled pork is available for sale beginning on July 4 beginning at 6:00 am until it is gone.
Parks & Public Services
Louise Martin Memorial Park has an approximately 6/10th of a mile walking/running loop that is paved and another approximately half mile of walking/running trail. Additionally, the park has three baseball fields, and a small play area for children. There are several picnic areas and a large open field available for various activities.
Greenbrier High School, Greenbrier Middle School, Greenbrier Elementary School, and Watauga Elementary School are the public schools offered for residents of Greenbrier and surrounding areas (Watauga is in nearby Ridgetop). Greenbrier High, Middle, and Elementary Schools' mascot is the Bobcat, and their colors are green and white. Watauga Elementary School's mascot is the Warrior, depicted as a Native American male, and the school colors are red and gray. The total population of children attending these public schools is roughly 2,500. There are no private schools in Greenbrier, but nearby Springfield has quite a few such as South Haven Christian School whose colors are red and white.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "Annual Estimates of the Resident Population for Incorporated Places: April 1, 2010 to July 1, 2014". Retrieved June 4, 2015.
- "Census of Population and Housing: Decennial Censuses". United States Census Bureau. Retrieved 2012-03-04.
- "Incorporated Places and Minor Civil Divisions Datasets: Subcounty Resident Population Estimates: April 1, 2010 to July 1, 2012". Population Estimates. U.S. Census Bureau. Retrieved 11 December 2013.