Town of Marble City is a town in Sequoyah County, Oklahoma, United States. It is part of the Fort Smith, Arkansas-Oklahoma Metropolitan Statistical Area. The population was 263 at the 2010 census, an increase of 8.7 percent over the figure of 242 recorded in 2000, making it the seventh-largest town by population in Sequoyah County, after Gans and before Moffett.

Sequoyah County is a county located in the U.S. state of Oklahoma. As of the 2020 census, the population was 39,281. The county seat is Sallisaw. Sequoyah County was created in 1907 when Oklahoma became a state. It was named after Sequoyah, who created the Cherokee syllabary and its written language.