Wyoming Citizen Population By County in 2018 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2018, the citizen population for Wyoming was 569,255 and represented 97.84% of the total Wyoming population.

Among all Wyoming counties, Laramie had the highest citizen population (96.02K), followed by Natrona (79.39K), and Campbell (46.89K).

In terms of percentages, Niobrara had the highest percentage of its population being citizens (100.00%), followed by Hot Springs (99.79%), and Johnson (99.59%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

You can see similar information for other states and by state for the United States.

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Wyoming Citizen Voting-age Population By County in 2018

Data Source: US Census - ACS 5-Year (CVAP).

See this for other years:

Wyoming Citizen Population By County in 2018

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County	Citizen Population	% of County Population
Laramie	96015	98.29
Natrona	79390	98.49
Campbell	46890	98.28
Sweetwater	42475	96.28
Fremont	39865	99.48
Albany	36250	95.14
Sheridan	29720	99.03
Park	28820	98.97
Teton	21060	91.33
Uinta	20075	97.40
Lincoln	18735	98.55
Carbon	14800	95.64
Converse	13830	98.82
Goshen	13310	99.03
Big Horn	11655	97.94
Sublette	9850	99.00
Platte	8520	98.21
Johnson	8480	99.59
Washakie	8060	99.14
Crook	7370	99.46
Weston	6965	98.10
Hot Springs	4670	99.79
Niobrara	2450	100.00