| County: | Platte County |
| State: | Wyoming |
| Ex Image: | WheatlandWY PlatteCountyCourthouse.jpg |
| Ex Image Cap: | Platte County Courthouse |
| Flag: | Flag of Platte County, Wyoming.svg |
| Founded: | February 21, 1911 (authorized) 1913 (organized) |
| Seat Wl: | Wheatland |
| Largest City: | Wheatland |
| City Type: | town |
| Area Total Sq Mi: | 2111 |
| Area Land Sq Mi: | 2084 |
| Area Water Sq Mi: | 27 |
| Area Percentage: | 1.3% |
| Population As Of: | 2020 |
| Population Total: | 8605 |
| Population Density Sq Mi: | auto |
| Web: | plattecountywyoming.com |
| Time Zone: | Mountain |
| Named For: | North Platte River |
| District: | At-large |
Platte County is a county located in the U.S. state of Wyoming. As of the 2020 United States Census, the population was 8,605.[1] Its county seat is Wheatland.[2]
Platte County was created February 21, 1911, with land detached from Laramie County and organized in 1913.[3] The county was named for the North Platte River, which flows through the northeastern part of the county.[4]
According to the US Census Bureau, the county has a total area of, of which is land and (1.3%) is water.[5] It is the third-smallest county in Wyoming by area.
As of the 2000 United States Census,[6] there were 8,807 people, 3,625 households, and 2,494 families in the county. The population density was 4/mi2. There were 4,528 housing units at an average density of 2/mi2. The racial makeup of the county was 96.18% White, 0.16% Black or African American, 0.50% Native American, 0.17% Asian, 0.02% Pacific Islander, 1.69% from other races, and 1.27% from two or more races. 5.28% of the population were Hispanic or Latino of any race. 31.7% were of German, 13.4% Irish, 11.3% English and 7.5% American ancestry.
There were 3,625 households, out of which 30.00% had children under the age of 18 living with them, 58.90% were married couples living together, 6.80% had a female householder with no husband present, and 31.20% were non-families. 27.30% of all households were made up of individuals, and 13.20% had someone living alone who was 65 years of age or older. The average household size was 2.40 and the average family size was 2.92.
The county population contained 25.40% under the age of 18, 6.60% from 18 to 24, 24.30% from 25 to 44, 27.30% from 45 to 64, and 16.60% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 97.40 males. For every 100 females age 18 and over, there were 96.50 males.
The median income for a household in the county was $33,866, and the median income for a family was $41,449. Males had a median income of $31,484 versus $19,635 for females. The per capita income for the county was $17,530. About 8.50% of families and 11.70% of the population were below the poverty line, including 15.90% of those under age 18 and 12.20% of those age 65 or over.
As of the 2010 United States Census, there were 8,667 people, 3,838 households, and 2,505 families in the county.[7] The population density was 4.2/mi2. There were 4,667 housing units at an average density of 2.2/mi2.[8] The racial makeup of the county was 95.4% white, 0.4% Asian, 0.4% American Indian, 0.3% black or African American, 0.1% Pacific islander, 2.0% from other races, and 1.5% from two or more races. Those of Hispanic or Latino origin made up 6.7% of the population.[7] In terms of ancestry, 45.3% were German, 21.1% were English, 17.3% were Irish, and 6.2% were American.[9]
Of the 3,838 households, 24.5% had children under the age of 18 living with them, 54.9% were married couples living together, 6.9% had a female householder with no husband present, 34.7% were non-families, and 30.6% of all households were made up of individuals. The average household size was 2.23 and the average family size was 2.76. The median age was 47.5 years.[7]
The median income for a household in the county was $42,947 and the median income for a family was $51,759. Males had a median income of $55,757 versus $29,366 for females. The per capita income for the county was $24,185. About 6.1% of families and 10.3% of the population were below the poverty line, including 18.2% of those under age 18 and 3.5% of those age 65 or over.[10]
Platte County has been a statewide bellwhether since its creation in 1912. No candidate in history has ever carried Wyoming without winning Platte County.