Teays Valley is located at . According to the United States Census Bureau, the CDP has a total area of 7.3 square miles, of which 7.2 square miles is land and 0.1 square mile is water. The valley referred to by "Teays Valley" is a portion of the remains of the pre-glacial Teays River. Today, the valley's water is shed through a number of creeks which empty into the Kanawha and Mud rivers.
Demographics
As of the census of 2000, there were 12,704 people, 4,789 households, and 3,749 families residing in the CDP. The population density was 1,730.0 people per square mile. There were 5,062 housing units at an average density of 689.3/sq mi. The racial makeup of the CDP was 96.39% White, 0.94% Black or African American, 0.11% Native American, 1.59% Asian, 0.02% Pacific Islander, 0.25% from other races, and 0.70% from two or more races. Hispanics or Latinos of any race were 0.77% of the population. There were 4,789 households out of which 39.6% had children under the age of 18 living with them, 67.3% were married couplesliving together, 9.0% had a female householder with no husband present, and 21.7% were non-families. 19.1% of all households were made up of individuals and 7.6% had someone living alone who was 65 years of age or older. The average household size was 2.62 and the average family size was 3.00. The age distribution was 27.2% under 18, 6.4% from 18 to 24, 29.8% from 25 to 44, 24.1% from 45 to 64, and 12.4% who were 65 or older. The median age was 38 years. For every 100 females, there were 92.0 males. For every 100 females age 18 and over, there were 87.6 males. The median income for a household in Teays Valley was $53,053, and the median income for a family was $62,711. Males had a median income of $52,083 versus $27,036 for females. The per capita income for the CDP was $24,236. About 6.5% of families and 8.1% of the population were below the poverty line, including 9.6% of those under age 18 and 8.0% of those age 65 or over.
Fire Department
The Teays Valley area is primarily protected by the . The department was founded in 1964 by the Scott/Teays Lions Club as an all volunteer department. In March 2013 the TVFD became a combination fire department consisting of 24/7 coverage by a paid staff supplemented by a group of dedicated volunteers.
Jack Whittaker, winner of the largest undivided lottery prize in history and the third-largest jackpot in U.S. history, lived in Teays Valley at the time of his win.