|Named for||James Madison|
|Total||5.8 sq mi (15 km2)|
|Land||5.8 sq mi (15 km2)|
|Water||0.0 sq mi (0 km2)|
|Elevation||994 ft (303 m)|
|Density||677.4/sq mi (261.5/km2)|
|Time zone||Eastern (EST) (UTC-5)|
|Summer (DST)||EDT (UTC-4)|
|GNIS feature ID||1326391|
Madisonville is located at . It is situated along U.S. Route 411 just east of its junction with State Route 68, near the center of Monroe County. The Unicoi Mountains rise prominently to the southeast.(35.520691, -84.362905)
According to the United States Census Bureau, Madisonville has a total area of 5.8 square miles (15 km2), all land.
As of the census of 2000, there were 3,939 people, 1,671 households, and 1,066 families residing in the town. The population density was 677.4 people per square mile (261.3/km ). There were 1,806 housing units at an average density of 310.6 per square mile (119.8/km ). The racial makeup of the town was 93.42% White, 3.96% African American, 0.25% Native American, 0.33% Asian, 0.13% Pacific Islander, 0.79% from other races, and 1.12% from two or more races. Hispanic or Latino of any race were 2.01% of the population.
There were 1,671 households out of which 27.6% had children under the age of 18 living with them, 46.4% were married couples living together, 13.8% had a female householder with no husband present, and 36.2% were non-families. 32.0% of all households were made up of individuals and 12.9% had someone living alone who was 65 years of age or older. The average household size was 2.26 and the average family size was 2.86.
In the town the population was spread out with 23.0% under the age of 18, 9.6% from 18 to 24, 27.6% from 25 to 44, 22.6% from 45 to 64, and 17.2% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 89.7 males. For every 100 females age 18 and over, there were 85.6 males.
The median income for a household in the town was $29,250, and the median income for a family was $31,918. Males had a median income of $31,504 versus $23,828 for females. The per capita income for the town was $16,468. About 13.3% of families and 18.8% of the population were below the poverty line, including 26.8% of those under age 18 and 14.0% of those age 65 or over.
The City of Madisonville originally began as the town of Tellico, and prior to that a Cherokee village of the same name. The Calhoun Treaty and resulting Hiwassee Purchase of 1819 opened the area for white settlement. Madisonville was founded in the early 1820s as a county seat for Monroe County, which had been formed in 1819. The town was initially known as "Tellico," but its name was changed to "Madisonville" in 1830 in honor of U.S. President James Madison in accordance with a petition from the residents presented by state representative James Madison Greenway. Madisonville was incorporated on May 16, 1850.
Monroe County Schools serve Madisonville: Madisonville Primary School, Madisonville Intermediate School, Madisonville Middle School and Sequoyah High School.