Trafford is a town in Jefferson County, Alabama, United States. A little portion extends into Blount County. The town was incorporated in 1948. At the 2020 census, the population was 613.

Trafford is located in northern Jefferson County at 33°49′8″N 86°44′48″W / 33.81889°N 86.74667°W / 33.81889; -86.74667 (33.818957, -86.746581). The Locust Fork of the Black Warrior River flows through the northwest ration of town. The town of County Line borders the town to the east. Trafford is 26 miles (42 km) north of downtown Birmingham.

According to the U.S. Census Bureau, the town has a total area of 2.4 square miles (6.3 km), all land.

At the 2000 census there were 523 people, 220 households, and 159 families in the town. The population density was 344.5 inhabitants per square mile (133.0/km). There were 240 housing units at an average density of 158.1 per square mile (61.0/km²). The racial makeup of the town was 98.47% White, 0.96% Black or African American, 0.19% from further races, 0.38% from two or more races and 0.19% of the population were Hispanic or Latino of any race.
Of the 220 households 25.5% had children under the age of 18 living subsequently them, 52.7% were married couples busy together, 15.0% had a female householder next no husband present, and 27.7% were non-families. 25.5% of households were one person and 12.7% were one person aged 65 or older. The average household size was 2.38 and the average intimates size was 2.82.