In October 1872, "old" Kansas City, Kansas, was incorporated. The first city election was held on October 22 of that year, by order of Judge Hiram Stevens of the Tenth Judicial District, and resulted in the election of Mayor James Boyle. The mayors of the city after its organization were James Boyle, C. A. Eidemiller, A. S. Orbison, Eli Teed and Samuel McConnell. In June 1880, the Governor of Kansas proclaimed the city of Kansas City a city of the second class with Mayor McConnell present.
In March 1886, "new" Kansas City, Kansas, was formed through the consolidation of five municipalities: "old" Kansas City, Armstrong, Armourdale, Riverview, Wyandotte. The oldest city of the group was Wyandotte, which was formed in 1857 by Wyandot Native Americans and Methodist missionaries.:370, 384, 388
In the 1890s, the city saw an explosive growth in population as a streetcar suburb of Kansas City, Missouri. This growth continued until the 1930s. It was one of the nation's 100 largest cities for many U.S. Census counts, from 1890 to 1960, including 1920, when it had a population of over 100,000 residents for the first time.
As with adjacent Kansas City, Missouri, the percentage of the city's most populous ethnic group, non-Hispanic whites, has declined from 76.3% in 1970 to 40.2% in 2010. In 1997, voters approved a proposition to unify the city and county governments creating the Unified Government of Wyandotte County.
According to the United States Census Bureau, the city has a total area of 128.38 square miles (332.50 km2), of which, 124.81 square miles (323.26 km2) is land and 3.57 square miles (9.25 km2) is water.
Neighborhoods of Kansas City, Kansas, include the following:
Kansas City lies in the Midwestern United States, as well as near the geographic center of the country, at the confluence of the longest river in the country, the Missouri River, and the Kansas River (also known as the Kaw River). The city lies in the Humid continental climate (Köppen Dfa) zone, with four distinct seasons, and moderate precipitation, and is part of USDA plant hardiness zones 5b and 6a Being located in the center of North America, far removed from a significant body of water, there is significant potential for extremes of hot and cold swings in temperature throughout the year. Unless otherwise stated, normal figures below are based on data from 1981 to 2010 at Downtown Airport. The warmest month of the year is July, with a 24-hour average temperature of 81.0 °F (27.2 °C). The summer months are hot, but can get very hot and moderately humid, with moist air riding up from the Gulf of Mexico. High temperatures surpass 100 °F (38 °C) on 5.6 days of the year, and 90 °F (32 °C) on 47 days. The coldest month of the year is January, with an average temperature of 31.0 °F (−0.6 °C). Winters are cold, with 22 days where the high is at or below the freezing mark and 2.5 nights with a low at or below 0 °F (−18 °C). The official record maximum temperature is 113 °F (45 °C), set on August 14, 1936, at Downtown Airport, while the official record minimum temperature is −23 °F (−31 °C), set on December 22 and 23, 1989. Normal seasonal snowfall is 13.4 inches (34 cm) at Downtown Airport and 18.8 in (48 cm) at Kansas City International Airport. The average window for freezing temperatures is October 31 to April 4, while for measurable (0.1 in or 0.25 cm) snowfall, it is November 27 to March 16 as measured at Kansas City International Airport. Precipitation, both in frequency and total accumulation, shows a marked uptick in late spring and summer.