Joplin is a city in Jasper and Newton counties in the southwestern corner of the U.S. state of Missouri. The bulk of the city is in Jasper County, while the southern portion is in Newton County. Joplin is the largest city located within both Jasper and Newton Counties - even though it is not the county seat of either county (Carthage is the seat of Jasper County while Neosho is the seat of Newton County). With a population of 51,762 as of the 2020 census, Joplin is the 12th most-populous city in the state. The city covers an area of 35.69 square miles (92.41 km2) on the outer edge of the Ozark Mountains. Joplin is the main hub of the three-county Joplin-Miami, Missouri-Oklahoma Metro area, which is home to 210,077 people making it the 5th largest metropolitan area in Missouri. In May 2011, the city was hit by a violent EF5 tornado.

Miami ( my-AM-ə) is a city in and county seat of Ottawa County, Oklahoma, United States, founded in 1891. Lead and zinc mining established by 1918, caused it to boom. It is the capital of the Miami Tribe of Oklahoma, after which it is named, the Modoc Tribe of Oklahoma, the Ottawa Tribe of Oklahoma, the Peoria Tribe of Indians and the Shawnee Tribe. As of the 2010 census, the city had 13,570 inhabitants, a one percent decline since 2000.

Coffeyville is a city in southeastern Montgomery County, Kansas, United States, located along the Verdigris River in the state's southeastern region. As of the 2020 census, the population of the city was 8,826. Coffeyville is the most populous city of Montgomery County, and the home to Coffeyville Community College. The town of South Coffeyville, Oklahoma is approximately 1 mile south of the city.

Bartlesville is a city mostly in Washington County in the U.S. state of Oklahoma. The population was 35,750 at the 2010 census, with a 2019 estimate of 36,144 according to the U.S. Census Bureau. Bartlesville is 47 miles (76 km) north of Tulsa and 18 miles (29 km) south of the Kansas border. It is the county seat of Washington County. The Caney River runs through Bartlesville. Bartlesville is the primary city of the Bartlesville Micropolitan area, which consists of Washington County and had a population of 51,843 in 2018. A small portion of the city is in Osage County. The city is also part of the Tulsa Combined Statistical Area, with a population of 1,151,172 in 2015. Bartlesville is notable as the longtime home of Phillips Petroleum Company. Frank Phillips founded Phillips Petroleum in Bartlesville in 1905 when the area was still an Indian Territory. The company merged with Conoco as ConocoPhillips and later split into the two independent companies, Phillips 66 and ConocoPhillips. Both companies have retained some operations in Bartlesville, but they have moved their corporate headquarters to Houston. It is one of two places in Oklahoma where a Lenape Native American tribe lives, the other being Anadarko.