Ponca is an unincorporated community and census-designated place (CDP) in Newton County, Arkansas, United States. Ponca is located on Arkansas Highway 43, 10 miles (16 km) west of Jasper. Ponca has a post office with ZIP code 72670. Ponca is well known for its access to the Buffalo National River, which is a hub for naturalist as well as photography and hiking tourism. Ponca is also known for the regular sightings of elk, which reside in the Boxley Valley. Per the 2020 census, the population was 30.