What are the largest counties in Wyoming?

Laramie County is the largest county in Wyoming, with 102,938 residents in 2025 (Census PEP). Natrona County (80,526) and Campbell County (48,145) come next.

Data as of 2025 · updated November 5, 2026

See the ranking All Wyoming counties

Want Pro for Wyoming? Get notified

All 23 ranked Wyoming counties

Wyoming counties ranked by population
Rank	County	Residents 2025	Change 2020–25
1	Laramie County	102,938	+2.2%
2	Natrona County	80,526	+0.3%
3	Campbell County	48,145	+2.1%
4	Sweetwater County	41,267	−2.2%
5	Fremont County	39,464	+0.7%
6	Albany County	38,558	+3.9%
7	Sheridan County	33,241	+7.2%
8	Park County	31,171	+5.1%
9	Teton County	23,333	−0.2%
10	Lincoln County	21,180	+7.8%
11	Uinta County	20,728	+1.3%
12	Carbon County	14,013	−3.4%
13	Converse County	13,824	+0.6%
14	Goshen County	12,640	+1.0%
15	Big Horn County	12,024	+4.7%
16	Sublette County	8,929	+2.2%
17	Johnson County	8,908	+5.2%
18	Platte County	8,634	+0.0%
19	Crook County	7,852	+9.3%
20	Washakie County	7,597	−0.8%
21	Weston County	6,840	+0.3%
22	Hot Springs County	4,600	−0.5%
23	Niobrara County	2,341	−4.5%

How this is ranked

The Census Bureau's July 1 resident population estimates for 2025, largest first, with the change since 2020. Counties with fewer than 1,000 residents are not ranked. Areas without an estimate for the same year as the others are not ranked.

Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025). Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how ranks and figures are built.

Get the report for any Wyoming county — $99

The County Growth and Demographics Report for any county as a PDF, from federal data: population and migration, housing and rents, permits, private employers and jobs, unemployment, ranks in the state and the country, and neighbouring counties, with a source next to every number. Pay once, no subscription.

Choose a county — $99

Every purchase also includes a CSV of every table in the report, ready for a spreadsheet.

Not useful? Email us within 14 days for a full refund
Sold by Simply Stats LLC (NC)
Secure Stripe checkout (Apple Pay/Google Pay)
Instant PDF download
PDF + CSV of every table

Refund terms: Terms. · How we compute every number

Questions

What is the largest county in Wyoming?

Laramie County is the largest county in Wyoming, with 102,938 residents in 2025 (Census PEP). Natrona County (80,526) and Campbell County (48,145) come next.

How is this ranking calculated?

More rankings for Wyoming

Largest counties by population in other states

Across the U.S.