Platte County, Wyoming

Platte County population, land area and income

Platte County had 8,512 residents in the Census Vintage 2024 estimate, on 2,081.5 square miles of land. It ranks 18th of 23 in Wyoming by population and 22nd by land area. That works out to 4.1 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in Wyoming has 14,250 residents; Platte County is somewhat smaller.

Its SAIPE 2023 median household income of $64,207 is above the national county median among 3,143 counties with an estimate.

How Platte County's population changed since 2020

Platte County lost 120 residents between the July 2020 and July 2024 estimates, a drop of 1.4%. That ranks 20th of 23 in Wyoming for growth. The median Wyoming county changed by +0.9%, and the state as a whole by +1.7%.

Since the April 2020 estimates base, Platte County recorded 319 births and 574 deaths, a natural change of -255. Net international migration added +77 and net domestic migration, people moving to or from other US counties, came to +94. The largest single component was natural change, which removed 255 people.

Where Platte County is

The Census internal point of Platte County is at 42.131600, -104.954000. It sits in UTM zone 13N. The map shades Wyoming's 23 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Platte County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Platte County

2 incorporated places of 1,000+ people have residents in Platte County, 4,569 people together, or 54% of the county. Each figure counts only the part of the town inside Platte County; towns marked "part" extend into another county. The largest is Wheatland with 3,475.

Counties bordering Platte County

The Census 2024 county adjacency file lists 5 neighbors for Platte County. The most populous is Laramie County, WY, with 101,783 residents. Distances run between Census internal points in a straight line.

• Laramie County

  101,783 people

  60 mi SSE

• Albany County

  39,288 people

  51 mi SW

• Converse County

  13,766 people

  66 mi NNW

• Goshen County

  12,635 people

  31 mi E

• Niobrara County

  2,301 people

  69 mi NNE

Distance to Cheyenne and the nearest big city

Cheyenne is 68.9 miles S of Platte County's internal point in a straight line. The nearest place of 100,000 or more is Fort Collins, CO (population 170,924), 109.5 miles away. The nearest place of 10,000 or more is Laramie, WY (population 32,957), 66.3 miles away.

Platte County FIPS code

The FIPS code of Platte County is 56031: state code 56 for Wyoming plus county code 031. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $64,207.