Platte County, Missouri in the context of Kansas City International Airport

Kansas City, Missouri, abbreviated KC or KCMO, is the largest city in the U.S. state of Missouri by population and area. It is located on the Missouri River at its confluence with the Kansas River, within Jackson, Clay, Platte and Cass counties. It is the 38th-most populous city in the United States and sixth-most populous city in the Midwest, with a population of 508,090 at the 2020 census. The Kansas City metropolitan area, which straddles the Missouri–Kansas state line, is the 31st-most populous metropolitan area in the nation, at 2.25 million residents.

Kansas City was founded in the 1830s as a port on the Missouri and Kansas rivers. On June 1, 1850, the town of Kansas was incorporated; soon afterwards, a region designated as the Kansas Territory was established. Confusion between the city and the territory of Kansas ensued, so the name Kansas City was assigned to distinguish the city from the territory. Sited on Missouri's western border with Kansas and with downtown near the rivers' confluence, Kansas City, Missouri encompasses about 319.03 square miles (826.3 km), making it the 25th-largest city by total area in the United States. It is one of Jackson County's two seats along with the major satellite city of Independence; and Kansas City's other major Missouri suburbs include Blue Springs, Lee's Summit, Raytown, and Liberty. Kansas City Missouri's major Kansas suburbs include Overland Park, Olathe, Lenexa, and Kansas City, Kansas.

There are 114 counties and one independent city in the U.S. State of Missouri. Following the Louisiana Purchase and the admittance of Louisiana into the United States in 1812, five counties were formed out of the Missouri Territory at the first general assembly: Cape Girardeau, New Madrid, Saint Charles, Saint Louis, and Ste. Genevieve. Most subsequent counties were apportioned from these five original counties. Six more counties were added through the 1836 Platte Purchase, the acquired lands of which formed the northwest tip of the state and consisted of Andrew, Atchison, Buchanan, Holt, Nodaway, and Platte counties.

In Missouri, the county level of government comes between those of the city and the state. Its primary responsibilities include maintaining roads, providing security, prosecuting criminals, and collecting taxes. Elected officials at this level include a sheriff, prosecuting attorney, and assessor.

Holt County is a county located in the northwestern portion of the U.S. state of Missouri. As of the 2020 census, the population was 4,223. Its county seat is Oregon. The county was organized February 15, 1841. Originally named Nodaway County, it was soon renamed for David Rice Holt (1803–1840), a Missouri state legislator from Platte County.