County outline
Where Eureka County is located
Area breakdown
Land accounts for 99.9% of Eureka County’s measured area and water for 0.1%. Its combined area converts to 10,826 square kilometers or approximately 2,675,173 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 4,175.688 | 10,814.982 | 2,672,440.3 |
| Water | 4.27 | 11.059 | 2,732.8 |
| Total | 4,179.958 | 10,826.042 | 2,675,173.1 |
How Eureka County compares
By original Census land area, Eureka County ranks #11 of 17 in Nevada and #114 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.757 times the Nevada county-equivalent median of 5,519.2 square miles. It accounts for 3.8% of the combined county land area in the state.
See the complete Nevada ranking · What counts as a county equivalent?
Population and density of Eureka County
The Census Bureau estimates that 1,867 people lived in Eureka County on July 1, 2025. That ranks #3,127 of 3,222 county equivalents nationally and #16 of 17 in Nevada. Since the April 1, 2020 estimates base of 1,852, the population has grown by 15 (+0.8%), compared with +5.7% for Nevada as a whole.
With 4,175.7 square miles of land, that is 0.45 people per square mile (0.17 per km²), placing Eureka County #3,199 nationally for density and #15 in Nevada. The median county equivalent has 47 people per square mile; the Nevada median is 3.2. Put another way, there are about 1,431 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 1,852 | 1,906 | 1,858 | 1,904 | 1,917 | 1,867 |
| Change | — | +54 | −48 | +46 | +13 | −50 |
U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.
Cities and towns in Eureka County
Eureka County has no incorporated cities, towns or villages. All 1,867 of its residents live in unincorporated communities, which the Census Bureau describes as census-designated places rather than municipalities.
Metropolitan area
Eureka County is an outlying county of the Elko, NV Micropolitan Statistical Area. Its 2 county equivalents have 56,682 residents on 21,349 square miles of land; Eureka County accounts for 19.6% of the land and 3.3% of the residents. By combined land it ranks #1 of 542 micropolitan areas, and #186 by population.
| County equivalent | Population 2025 | Land mi² |
|---|---|---|
| Elko County | 54,815 | 17,173.3 |
| Eureka County | 1,867 | 4,175.7 |
ZIP codes
4 ZIP Code Tabulation Areas have land in Eureka County; 3 of them have most of their land inside the county, and the others mainly cover neighboring areas.
89316898208982189822
ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.
Counties bordering Eureka County
Eureka County shares a land border with 4 county equivalents. Each of them has more land than Eureka County. The largest neighbor is Nye County (18,181.9 mi²) and the smallest is Lander County (5,519.2 mi²). Together with its neighbors, Eureka County forms a block of 53,936.8 mi² of land, of which it holds 7.7%.
| Bordering county equivalent | Land mi² | Size vs. Eureka | Compare |
|---|---|---|---|
| Nye County | 18,181.9 | 4.4× larger | Compare |
| Elko County | 17,173.3 | 4.1× larger | Compare |
| White Pine County | 8,886.7 | 2.1× larger | Compare |
| Lander County | 5,519.2 | 1.3× larger | Compare |
How big is Eureka County compared with U.S. states?
Eureka County has more land than 2 of the 50 states. It is about 2.1 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 1.2 times as much land (4,842.5 mi²). Nevada’s county land could hold about 26 areas the size of Eureka County.
Another way to picture it: the same land area would fill a square about 64.6 miles (104 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.
State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.
What stands out about Eureka County?
Eureka County has more land than 3,108 of the other 3,221 county equivalents in the dataset.
A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.
Does including water change its rank?
Using land plus water places Eureka County at #124 nationally by total area, 10 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.
Its water share is 0.1%, compared with a national county-equivalent median of 1.2% — 1.1 percentage points lower. This describes the statistical geography’s land/water mix, not flood exposure or developable land.
Closest positions in the national land ranking
These entries sit immediately beside Eureka County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #113 | Eddy County, New Mexico | 4,176.3 | Compare |
| #114 | Eureka County, Nevada | 4,175.7 | This county |
| #115 | Imperial County, California | 4,175.5 | Compare |
Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.
Representative coordinates
The Census internal point is 39.977788, -116.272208. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.
Source and precision
U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 10,814,982,428 m²; AWATER: 11,058,701 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Eureka County?
Eureka County, Nevada has 4,175.7 square miles (10,815 km²) of land and 4.27 square miles of water, for a total area of 4,180 square miles. It ranks #114 of 3,222 U.S. county equivalents by land area.
Is Eureka County the largest county in Nevada?
No. Eureka County ranks #11 of 17 in Nevada by land area. The largest is Nye County, with 18,181.9 square miles of land.
What counties border Eureka County?
Eureka County shares a land border with Lander County, Elko County, White Pine County, and Nye County.
What is the population of Eureka County?
The Census Bureau estimates Eureka County had 1,867 residents on July 1, 2025, ranking #3,127 of 3,222 county equivalents. That is 0.45 people per square mile of land.
What is the county seat of Eureka County?
The county seat of Eureka County is Eureka.
Is Eureka County part of a metropolitan area?
Yes. It is an outlying county of the Elko, NV Micropolitan Statistical Area, which has 2 county equivalents and 56,682 residents.
How many ZIP codes are in Eureka County?
4 ZIP Code Tabulation Areas have land in Eureka County, and 3 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Eureka County compare with U.S. states?
It has more land than 2 of the 50 states, including Delaware (1,948.6 square miles of land).
How many acres of land are in Eureka County?
The land measurement converts to approximately 2,672,440 acres. Including water, total area is approximately 2,675,173 acres. One square mile equals 640 acres.
Why might another source show a different area?
Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.
Can this establish a property boundary?
No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.