|• Total||0.4 sq mi (0.9 km2)|
|• Land||0.4 sq mi (0.9 km2)|
|• Water||0.0 sq mi (0.0 km2)|
|Elevation||1,339 ft (408 m)|
|• Density||830/sq mi (370/km2)|
|Time zone||Eastern (EST) (UTC-5)|
|• Summer (DST)||EDT (UTC-4)|
|GNIS feature ID||1483171|
Dungannon is part of the Kingsport–Bristol (TN)–Bristol (VA) Metropolitan Statistical Area, which is a component of the Johnson City–Kingsport–Bristol, TN-VA Combined Statistical Area – commonly known as the "Tri-Cities" region.
Dungannon is located at .(36.827894, -82.468828)
According to the United States Census Bureau, the town has a total area of 0.4 square miles (1.0 km2), all of it land.
As of the census of 2000, there were 317 people, 132 households, and 90 families residing in the town. The population density was 869.5 people per square mile (340.0/km²). There were 149 housing units at an average density of 408.7 per square mile (159.8/km²). The racial makeup of the town is 100.00% White.
There were 132 households out of which 33.3% had children under the age of 18 living with them, 56.8% were married couples living together, 10.6% had a female householder with no husband present, and 31.1% were non-families. 28.0% of all households were made up of individuals and 17.4% had someone living alone who was 65 years of age or older. The average household size was 2.40 and the average family size was 2.96.
In the town the population was spread out with 24.0% under the age of 18, 9.8% from 18 to 24, 27.1% from 25 to 44, 25.2% from 45 to 64, and 13.9% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 89.8 males. For every 100 females age 18 and over, there were 89.8 males.
The median income for a household in the town was $21,406, and the median income for a family was $27,292. Males had a median income of $26,042 versus $16,389 for females. The per capita income for the town was $12,200. About 21.3% of families and 25.1% of the population were below the line of poverty, including 37.3% of those under age 18 and 7.3% of those age 65 or over.
- "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.
- "National Register Information System". National Register of Historic Places. National Park Service. 2010-07-09.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.