Madill is a city in and the county seat of Marshall County, Oklahoma, United States. It was named in award of George Alexander Madill, an attorney for the St. Louis-San Francisco Railway. The population at the 2010 census was 3,770, an accumulation of 10.8 percent from 3,410 at the 2000 census. It is best known as the site of the annual National Sand Bass Festival. It is allocation of the Texoma region.

Madill was founded in 1900 by William N. Taliaferro, who had arranged in 1886, in what was next known as Pickens County, Chickasaw Nation, in the Indian Territory. Taliaferro owned a 600 acres (240 ha) farm and operated some ranches in the simple town of Oakland, 2 miles (3.2 km) northwest of Madill. Oakland had been the area’s largest town, but the St. Louis, San Francisco and New Orleans Railroad building through the town caused Madill to build up and Oakland, two miles northwest, to decline. A broadcast office was conventional at Madill upon April 29, 1901, The city was chartered on September 12, 1902. The first public intellectual opened in a four-room frame structure built on the south side of the town in 1903.

Farming and ranching became the town’s principal industries to come in its history because the surrounding area was highly fruitful and the railroad provided good transportation to markets. There were as a consequence mineral springs nearby, and an oil seep north of town. The Arbuckle oilfield was discovered in 1904, and experienced substitute boom in 1924. Pure Oil Company brought in a skillfully east of town in 1939 and built a company town called Pure Camp to house the oilfield workers. Pure Camp was destroyed by a tornado and killed two people on April 2, 1957. The camp closed permanently in July, 1959. Madill was struck by other EF-2 tornado during the Tornado outbreak of April 22–23, 2020.

Madill is located at 34°5′29″N 96°46′25″W / 34.09139°N 96.77361°W / 34.09139; -96.77361 (34.091261, -96.773565). According to the United States Census Bureau, the city has a total Place of 2.9 square miles (7.5 km²), of which 2.9 square miles (7.5 km) is estate and 0.04 square miles (0.10 km²) (1.37%) is water.