[4] Jasper is part of the Harrison Micropolitan Statistical Area.

According to the United States Census Bureau, the city has a total area of 0.5 square miles (1.3 km2), all land.

As of the 2020 United States census, there were 547 people, 240 households, and 137 families residing in the city.

At the 2000 census there were 498 people in 231 households, including 115 families, in the city.

There were 261 housing units at an average density of 492.9 per square mile (190.3/km2).