County outline
Where Greenlee County is located
Area breakdown
Land accounts for 99.8% of Greenlee County’s measured area and water for 0.2%. Its combined area converts to 4,784.9 square kilometers or approximately 1,182,369 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 1,842.838 | 4,772.929 | 1,179,416.3 |
| Water | 4.613 | 11.948 | 2,952.3 |
| Total | 1,847.451 | 4,784.876 | 1,182,368.6 |
How Greenlee County compares
By original Census land area, Greenlee County ranks #14 of 15 in Arizona and #317 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.297 times the Arizona county-equivalent median of 6,209.9 square miles. It accounts for 1.6% of the combined county land area in the state.
See the complete Arizona ranking · What counts as a county equivalent?
Population and density of Greenlee County
The Census Bureau estimates that 9,312 people lived in Greenlee County on July 1, 2025. That ranks #2,537 of 3,222 county equivalents nationally and #15 of 15 in Arizona. Since the April 1, 2020 estimates base of 9,564, the population has declined by 252 (−2.6%), compared with +6.5% for Arizona as a whole.
With 1,842.8 square miles of land, that is 5.1 people per square mile (2 per km²), placing Greenlee County #2,852 nationally for density and #14 in Arizona. The median county equivalent has 47 people per square mile; the Arizona median is 17. Put another way, there are about 127 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 9,531 | 9,398 | 9,311 | 9,356 | 9,334 | 9,312 |
| Change | — | −133 | −87 | +45 | −22 | −22 |
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 Greenlee County
2 incorporated places lie at least partly in Greenlee County. Together they are home to 4,424 people (47.5%); the other 4,888 (52.5%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Clifton town, with 3,752 residents in the county.
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Clifton townCounty seat | 3,752 | −4.6% | 14.7 |
| Duncan town | 672 | −2.7% | 2.265 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Greenlee County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Greenlee County is not part of any metropolitan or micropolitan statistical area in the Office of Management and Budget’s July 2023 delineation; 1,306 other county equivalents are also outside one. These areas are built around an urban core of at least 10,000 people plus the counties tied to it by commuting, so counties outside them are generally rural.
ZIP codes
4 ZIP Code Tabulation Areas have land in Greenlee County, and each lies mostly inside the county.
85533855348554085922
ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Post-office-box and single-address ZIP Codes have no tabulation area.
Counties bordering Greenlee County
Greenlee County shares a land border with 6 county equivalents, including 3 in New Mexico. Each of them has more land than Greenlee County. The largest neighbor is Apache County (11,198.4 mi²) and the smallest is Hidalgo County (3,438.6 mi²). Together with its neighbors, Greenlee County forms a block of 38,196.9 mi² of land, of which it holds 4.8%.
| Bordering county equivalent | Land mi² | Size vs. Greenlee | Compare |
|---|---|---|---|
| Apache County | 11,198.4 | 6.1× larger | Compare |
| Catron CountyNew Mexico | 6,924.2 | 3.8× larger | Compare |
| Cochise County | 6,209.9 | 3.4× larger | Compare |
| Graham County | 4,621.9 | 2.5× larger | Compare |
| Grant CountyNew Mexico | 3,961.2 | 2.1× larger | Compare |
| Hidalgo CountyNew Mexico | 3,438.6 | 1.9× larger | Compare |
How big is Greenlee County compared with U.S. states?
Greenlee County has more land than 1 of the 50 states. It is about 1.8 times the land area of Rhode Island (1,033.9 mi²), while Delaware, the next larger state, has 1.1 times as much land (1,948.6 mi²). Arizona’s county land could hold about 62 areas the size of Greenlee County.
Another way to picture it: the same land area would fill a square about 42.9 miles (69.1 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 Greenlee County?
Greenlee County has more land than 2,905 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 Greenlee County at #358 nationally by total area, 41 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 0.2%, compared with a national county-equivalent median of 1.2% — 0.9 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 Greenlee County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #316 | Grand County, Colorado | 1,846.6 | Compare |
| #317 | Greenlee County, Arizona | 1,842.8 | This county |
| #318 | Ventura County, California | 1,840.8 | 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 33.238872, -109.242323. 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: 4,772,927,136 m²; AWATER: 11,947,399 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 Greenlee County?
Greenlee County, Arizona has 1,842.8 square miles (4,772.9 km²) of land and 4.613 square miles of water, for a total area of 1,847.5 square miles. It ranks #317 of 3,222 U.S. county equivalents by land area.
Is Greenlee County the largest county in Arizona?
No. Greenlee County ranks #14 of 15 in Arizona by land area. The largest is Coconino County, with 18,616.4 square miles of land.
What counties border Greenlee County?
Greenlee County shares a land border with Graham County, Catron County, New Mexico, Grant County, New Mexico, Apache County, Hidalgo County, New Mexico, and Cochise County.
What is the population of Greenlee County?
The Census Bureau estimates Greenlee County had 9,312 residents on July 1, 2025, ranking #2,537 of 3,222 county equivalents. That is 5.1 people per square mile of land.
What is the county seat of Greenlee County?
The county seat of Greenlee County is Clifton.
What cities and towns are in Greenlee County?
Greenlee County has 2 incorporated places. The most populous are Clifton town and Duncan town; 4,888 residents live outside any incorporated place.
Is Greenlee County part of a metropolitan area?
No. Greenlee County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.
How many ZIP codes are in Greenlee County?
4 ZIP Code Tabulation Areas have land in Greenlee County, and 4 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Greenlee County compare with U.S. states?
It has more land than 1 of the 50 states, including Rhode Island (1,033.9 square miles of land).
How many acres of land are in Greenlee County?
The land measurement converts to approximately 1,179,416 acres. Including water, total area is approximately 1,182,369 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.