According to the U.S. Census Bureau, the city has a total area of 14.9 square miles (38.5 km²), of which, 14.6 square miles (37.9 km²) of it is land and 0.2 square miles (0.6 km²) of it (1.48%) is water.
Northport is directly adjacent to the larger city of Tuscaloosa, Alabama, and many residents work in Tuscaloosa or other parts of Tuscaloosa County. Although the two cities do share a land boundary, much of their boundary (and historically all of the boundary) is the Black Warrior River.
There were 7,844 households out of which 32.8% had children under the age of 18 living with them, 48.3% were married couples living together, 15.7% had a female householder with no husband present, and 33.0% were non-families. 28.6% of all households were made up of individuals and 9.7% had someone living alone who was 65 years of age or older. The average household size was 2.41 and the average family size was 2.98.
In the city the population was spread out with 24.9% under the age of 18, 10.5% from 18 to 24, 29.3% from 25 to 44, 21.3% from 45 to 64, and 14.1% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 83.9 males. For every 100 females age 18 and over, there were 79.6 males.
The median income for a household in the city was $40,206, and the median income for a family was $48,673. Males had a median income of $41,008 versus $26,340 for females. The per capita income for the city was $20,163. About 11.6% of families and 13.9% of the population were below the poverty line, including 20.4% of those under age 18 and 10.6% of those age 65 or over.
Another longstanding tradition of Northport is Art Night, which is held on the first Thursday of each month. Many of Northport's galleries open their doors after hours for this popular art demonstration. A trolley system runs between Downtown Northport and Downtown Tuscaloosa as a collaboration with Tuscaloosa's Art and Soul event.
Dickens Downtown is held the first Tuesday in December. This annual holiday event attracts many thousands of participants to come and see the period setting of 19th Century England.