McMullen is a town in Pickens County, Alabama, United States.

[4] According to the United States Census Bureau, the town has a total area of 0.1 square miles (0.26 km2), all land.

As of the 2020 United States census, there were 32 people, 6 households, and 0 families residing in the town.

At the 2000 census, there were 66 people, 31 households, and 19 families living in the town.

There were 8.3% of families and 13.4% of the population living below the poverty line, including 10.0% of under eighteens and 4.3% of those over 64.