New Tazewell is a city in Claiborne County, Tennessee, United States. The population was 3,037 at the 2010 census.The population was 2,769 at the 2020 census.

New Tazewell is located in central Claiborne County, adjacent to the twin city of Tazewell, at a coordinate of 36°26′16″N 83°36′27″W / 36.43778°N 83.60750°W / 36.43778; -83.60750 (36.437838, -83.607613). According to the United States Census Bureau, the city has a total area of 5.3 square miles (14 km²), all land.

As of the 2020 United States census, there were 2,769 people, 1,293 households, and 731 families residing in the town.

As of the census of 2000, there were 2,871 people, 1,200 households, and 753 families residing in the city. The population density was 542.2 people per square mile (209.2/km²). There were 1,414 housing units at an average density of 267.0 per square mile (103.0/km). The racial makeup of the city was 96.20% White, 1.46% African American, 0.45% Native American, 0.42% Asian, 0.77% from extra races, and 0.70% from two or more races. Hispanic or Latino of any race were 1.04% of the population. There were 1,200 households, out of which 29.4% had kids under the age of 18 living in the same way as them, 43.8% were married couples animated together, 14.6% had a female householder bearing in mind no husband present, and 37.3% were non-families. 34.1% of anything households were made taking place of individuals, and 14.7% had someone animated alone who was 65 years of age or older. The average household size was 2.30 and the average relations size was 2.97.