Nitro is a city in Kanawha and Putnam counties in the State of West Virginia, United States, along the Kanawha River. The population was 7,178 at the 2010 census.
Nitro is located at 38°24′55″N 81°49′52″W / 38.41528°N 81.83111°W / 38.41528; -81.83111 (38.415281, -81.831249), primarily in Kanawha County.
According to the United States Census Bureau, the city has a total area of 4.67 square miles (12.10 km), of which, 4.28 square miles (11.09 km) is land and 0.39 square miles (1.01 km) is water.
The city lies across the Kanawha River from the city of St. Albans to the south, and is adjacent to the census-designated place of Cross Lanes.
Nitro is a part of the Huntington-Ashland, WV-KY-OH, Metropolitan Statistical Area (MSA). As of the 2010 census, the MSA had a population of 287,702. New definitions from February 28, 2013 placed the population at 363,000.
As of the census of 2010, there were 7,178 people, 3,250 households, and 1,914 families residing in the city. The population density was 1,677.1 inhabitants per square mile (647.5/km). There were 3,507 housing units at an average density of 819.4 per square mile (316.4/km). The racial makeup of the city was 94.7% White, 2.3% African American, 0.5% Native American, 0.6% Asian, 0.6% from other races, and 1.4% from two or more races. Hispanic or Latino of any race were 1.6% of the population.
There were 3,250 households of which 25.9% had children under the age of 18 living with them, 41.4% were married couples living together, 12.8% had a female householder with no husband present, 4.8% had a male householder with no wife present, and 41.1% were non-families. 33.9% of all households were made up of individuals and 12.8% had someone living alone who was 65 years of age or older. The average household size was 2.21 and the average family size was 2.82.
The median age in the city was 40.5 years. 20.4% of residents were under the age of 18; 7.4% were between the ages of 18 and 24; 27.2% were from 25 to 44; 27.7% were from 45 to 64; and 17.3% were 65 years of age or older. The gender makeup of the city was 47.9% male and 52.1% female.
As of the census of 2000, there were 6,824 people, 3,015 households, and 1,935 families residing in the city. The population density was 1,821.2 people per square mile (702.6/km²). There were 3,217 housing units at an average density of 858.6 per square mile (331.2/km²). The racial makeup of the city was 96.64% White, 1.63% African American, 0.25% Native American, 0.25% Asian, 0.40% from other races, and 0.84% from two or more races. Hispanic or Latino of any race were 0.54% of the population.
There were 3,015 households out of which 23.9% had children under the age of 18 living with them, 47.3% were married couples living together, 12.7% had a female householder with no husband present, and 35.8% were non-families. 30.7% of all households were made up of individuals and 13.9% 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 2.80.
The age distribution was 20.1% under the age of 18, 8.8% from 18 to 24, 26.4% from 25 to 44, 26.1% from 45 to 64, and 18.7% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 89.7 males. For every 100 females age 18 and over, there were 87.0 males.
The median income for a household in the city was $32,389, and the median income for a family was $41,367. Males had a median income of $30,086 versus $21,932 for females. The per capita income for the city was $17,453. About 7.3% of families and 10.7% of the population were below the poverty line, including 12.5% of those under age 18 and 14.0% of those age 65 or over.