Fentress County was the site of several saltpeter mines. Saltpeter is the main ingredient of gunpowder and was obtained by leaching the earth from local caves. The largest mine was in York Cave, near the Wolf River Post Office. At one time, twenty-five large leaching vats were in operation in this cave. According to Barr (1961) this cave was mined during the Civil War. Buffalo Cave near Jamestown was also a major mine with twelve leaching vats. Manson Saltpeter Cave in Big Indian Creek Valley was a smaller operation with four leaching vats. These caves may also have been mined during the War of 1812, as saltpeter mining was widespread in Kentucky and Tennessee during that era.[7]
In the runup to the American Civil War, when Tennessee Governor Harris asked the State Legislature for a vote of secession, the two representatives from Fentress County (Reese T. Hildreth and R. H. Bledsoe) voted for secession. Nevertheless, in Tennessee's Ordinance of Secession referendum on June 8, 1861, Fentress County voted by a margin of 651 to 128 to remain in the Union.[8] However, earlier on February 9, 1861, Fentress County voters had voted to hold a secession convention by a very narrow margin of 334 to 325, becoming the only county that voted for the convention in February but to remain in the Union in June.[9]
According to the U.S. Census Bureau, the county has a total area of 499 square miles (1,290 km2), of which 499 square miles (1,290 km2) is land and 0.3 square miles (0.78 km2) (0.06%) is water.[11]
As of the 2020 United States census, there were 18,489 people, 7,443 households, and 4,929 families residing in the county.
2010 census
As of the 2010 census,[19] there were 17,959 people, 7,326 households, and 4,818 families residing in the county. The population density was 36 people per square mile (14 people/km2). There were 8,927 housing units at an average density of 15 units per square mile (5.8/km2). The racial makeup of the county was 98.1% White, 0.2% Black or African American, 0.2% Native American, 0.2% Asian, 0.4% from other races, and 0.9% from two or more races. 1.1% of the population were Hispanic or Latino of any race.
In the county's 7,326 households, 23.1% had children under the age of 18, 57.30% were married couples living together, 11.30% had a female householder with no husband present, and 28.00% were non-families. 25.50% of all households were made up of individuals, and 11.10% had someone living alone who was 65 years of age or older. The average household size was 2.46 and the average family size was 2.94.
In the county, the population was spread out, with 24.20% under the age of 18, 8.00% from 18 to 24, 28.10% from 25 to 44, 26.10% from 45 to 64, and 13.70% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 96.20 males. For every 100 females age 18 and over, there were 93.10 males.
The median income for a household in the county was $23,238, and the median income for a family was $28,856. Males had a median income of $23,606 versus $18,729 for females. The per capita income for the county was $12,999. 19.50% of families and 23.10% of the population were below the poverty line, including 27.80% of those under age 18 and 20.50% of those over age 64.
Similarly like the rest of East Tennessee, Fentress County is powerfully Republican, and has generally been favorable to that party ever since the Civil War.Fentress County has been heavily Republican since the Civil War. Since then, only two Democrats, Southerners Jimmy Carter in 1976 and Bill Clinton in 1992 and 1996 have carried Fentress County. Since 2000, the county has shifted further and further to the right.
United States presidential election results for Fentress County, Tennessee[20]
