Olive is an unincorporated community and a census-designated place (CDP) in Jefferson County, Alabama.

Mount Olive is bordered on the south and the east by the town of Gardendale, and in fact, some areas that had previously been in Mount Olive have been annexed into Gardendale over the years.

Eventually, part of Birmingham's Northern Beltline will cut through northwestern sections of Mt.

[2] According to the U.S. Census Bureau, the community has a total area of 9.3 square miles (24.1 km2), all land.

As of the 2020 United States census, there were 4,427 people, 1,620 households, and 1,280 families residing in the CDP.

At the 2010 census there were 4,079 people, 1,551 households, and 1,217 families residing in the community.

There were 1,631 housing units at an average density of 175.4 per square mile (67.7/km2).

At the 2000 census there were 3,957 people, 1,499 households, and 1,221 families residing in the community.

There were 1,553 housing units at an average density of 163.9 per square mile (63.3/km2).