**Geography:**
– Platte County Courthouse in Platte City was rebuilt after being burned during the Civil War.
– The county spans 427 square miles, with 420 square miles being land and 6.6 square miles water.
– Its southwestern border with Kansas is defined by the Missouri River.
– Medium-sized cities (10,000 to 100,000 in 2000): St. Joseph, St. Louis
– Largest cities: Kansas City, St. Louis, Springfield
– Other notable cities: Columbia, Independence
– Coordinates: 39°23′N 94°46′W
**Population and Demographics:**
– Population growth over the years: 1840 – 8,913, 1850 – 16,845, 1860 – 18,350, 1870 – 17,352, 1880 – 17,366.
– Recent population trends: 2010 – 89,322, 2020 – 106,718.
– In 2020, the county’s racial composition was 76.3% White, 7.62% Black, 0.36% Native American, 2.55% Asian, and 0.65% Pacific Islander.
– Other/mixed races accounted for 5.8%, while Hispanic or Latino individuals were 6.71% of the population.
– Ancestry breakdown: 23.4% German, 12.5% Irish, 12.2% American, and 11.4% English.
– Household statistics from the 2000 census: 91.45% White, 3.49% Black, 0.46% Native American, 1.48% Asian, and 1.05% other races.
– Median income figures: Household – $55,849, family – $65,236, per capita – $26,356.
**Politics and Local Government:**
– The Republican Party holds all local elected positions in Platte County.
– Governor Jay Nixon won the county in his elections, and Claire McCaskill narrowly won in 2004.
– Voting trends: 2016 – 51.84% Republican, 46.02% Democrat, 2.14% Other.
– The county is divided into three legislative districts in the Missouri House of Representatives.
– Recent elections in District 12 and District 13.
– The Republican Party dominates local politics in Platte County.
– The county has swung to the Republican party, but Kansas City’s presence keeps it competitive.
**Economy:**
– Platte County is part of the Kansas City metropolitan area.
– Kansas City International Airport is located in the county.
– The airport was originally in an unincorporated part of Platte County.
– The county seat is Platte City.
– Median household income in the county was $55,849.
**Election Results:**
– Missouri House of Representatives District 14 Platte County: Various election results from 2014 to 2022.
– Missouri Senate District 34 Platte County: Various election results from 2014 to 2022.
– U.S. Senate Missouri Platte County: Various election results from 2012 to 2022.
– U.S. House of Representatives Missouri’s 6th Congressional District Platte County: Various election results from 2018 to 2022.
– United States presidential election results for Platte County, Missouri: Results from 2012 to 2020.
Platte County is a county located in the northwestern portion of the U.S. state of Missouri and is part of the Kansas City metropolitan area. As of the 2020 census, the population was 106,718. Its county seat is Platte City. The county was organized December 31, 1838, from the Platte Purchase, named for the Platte River. (Platte is derived from the French word for a low, shallow, or intermittent stream.) The Kansas City International Airport is located in the county, approximately one mile west of Interstate 29 between mile markers 12 and 15. The land for the airport was originally in an unincorporated portion of Platte County before being annexed by Platte City, and eventually Kansas City.
Platte County | |
|---|---|
 Platte County Courthouse | |
 Flag | |
 Location within the U.S. state of Missouri | |
 Missouri's location within the U.S. | |
| Coordinates: 39°23′N 94°46′W / 39.38°N 94.77°W | |
| Country |  United States |
| State |  Missouri |
| Founded | December 31, 1838 |
| Named for | Platte River or Platte Purchase |
| Seat | Platte City |
| Largest city | Kansas City |
| Area | |
| • Total | 427 sq mi (1,110 km2) |
| • Land | 420 sq mi (1,100 km2) |
| • Water | 6.6 sq mi (17 km2) 1.5% |
| Population (2020) | |
| • Total | 106,718 |
| • Density | 250/sq mi (96/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 6th |
| Website | www |