Summit is a city in Marion County, Arkansas, United States. The population was 544 at the 2020 census, down from 604 in 2010.

Marion County is located in the Ozark Mountains in the U.S. state of Arkansas. The county is named for Francis Marion, the famous "Swamp Fox" of the Revolutionary War. Created as Arkansas's 35th county in 1836, Marion County is home to one incorporated town and four incorporated cities, including Yellville, the county seat. The county is also the site of numerous unincorporated communities and ghost towns. The county included part of what is now Searcy County, Arkansas, with many opposing to dividing them, which helped fueled the bloody Tutt-Everett War between 1844 and 1850.