County outline
Where Montezuma County is located
Area breakdown
Land accounts for 99.5% of Montezuma County’s measured area and water for 0.5%. Its combined area converts to 5,283.2 square kilometers or approximately 1,305,507 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 2,029.349 | 5,255.99 | 1,298,783.4 |
| Water | 10.505 | 27.208 | 6,723.2 |
| Total | 2,039.854 | 5,283.198 | 1,305,506.6 |
How Montezuma County compares
By original Census land area, Montezuma County ranks #20 of 64 in Colorado and #281 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 1.418 times the Colorado county-equivalent median of 1,431.5 square miles. It accounts for 2% of the combined county land area in the state.
See the complete Colorado ranking · What counts as a county equivalent?
Population and density of Montezuma County
The Census Bureau estimates that 26,678 people lived in Montezuma County on July 1, 2025. That ranks #1,597 of 3,222 county equivalents nationally and #22 of 64 in Colorado. Since the April 1, 2020 estimates base of 25,848, the population has grown by 830 (+3.2%), compared with +4.1% for Colorado as a whole.
With 2,029.3 square miles of land, that is 13 people per square mile (5.1 per km²), placing Montezuma County #2,531 nationally for density and #30 in Colorado. The median county equivalent has 47 people per square mile; the Colorado median is 11. Put another way, there are about 49 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 25,890 | 26,258 | 26,474 | 26,566 | 26,694 | 26,678 |
| Change | — | +368 | +216 | +92 | +128 | −16 |
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 Montezuma County
3 incorporated places lie at least partly in Montezuma County. Together they are home to 11,325 people (42.5%); the other 15,353 (57.5%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Cortez city, with 9,126 residents in the county. Among places with at least 1,000 residents in 2020, Mancos town grew fastest since then (+5.9%).
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Cortez cityCounty seat | 9,126 | +4.2% | 6.202 |
| Mancos town | 1,266 | +5.9% | 0.638 |
| Dolores town | 933 | +4.5% | 0.745 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Montezuma County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Montezuma 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
8 ZIP Code Tabulation Areas have land in Montezuma County; 7 of them have most of their land inside the county, and the others mainly cover neighboring areas.
8132181323813278132881330813318133481335
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 Montezuma County
Montezuma County shares a land border with 4 county equivalents, including 2 in New Mexico and Utah. It has more land than 2 of them. The largest neighbor is San Juan County (7,823.7 mi²) and the smallest is Dolores County (1,067.2 mi²). Together with its neighbors, Montezuma County forms a block of 18,127.1 mi² of land, of which it holds 11.2%.
| Bordering county equivalent | Land mi² | Size vs. Montezuma | Compare |
|---|---|---|---|
| San Juan CountyUtah | 7,823.7 | 3.9× larger | Compare |
| San Juan CountyNew Mexico | 5,517.2 | 2.7× larger | Compare |
| La Plata County | 1,689.7 | 1.2× smaller | Compare |
| Dolores County | 1,067.2 | 1.9× smaller | Compare |
How big is Montezuma County compared with U.S. states?
Montezuma County has more land than 2 of the 50 states. It is about 1 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 2.4 times as much land (4,842.5 mi²). Colorado’s county land could hold about 51 areas the size of Montezuma County.
Another way to picture it: the same land area would fill a square about 45 miles (72.5 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 Montezuma County?
Montezuma County has more land than 2,941 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 Montezuma County at #313 nationally by total area, 32 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 0.5%, compared with a national county-equivalent median of 1.2% — 0.7 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 Montezuma County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #280 | Morrow County, Oregon | 2,030.5 | Compare |
| #281 | Montezuma County, Colorado | 2,029.3 | This county |
| #282 | Cass County, Minnesota | 2,021.5 | 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 37.338025, -108.595786. 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: 5,255,989,938 m²; AWATER: 27,208,190 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 Montezuma County?
Montezuma County, Colorado has 2,029.3 square miles (5,256 km²) of land and 10.5 square miles of water, for a total area of 2,039.9 square miles. It ranks #281 of 3,222 U.S. county equivalents by land area.
Is Montezuma County the largest county in Colorado?
No. Montezuma County ranks #20 of 64 in Colorado by land area. The largest is Las Animas County, with 4,772.9 square miles of land.
What counties border Montezuma County?
Montezuma County shares a land border with Dolores County, La Plata County, San Juan County, New Mexico, and San Juan County, Utah.
What is the population of Montezuma County?
The Census Bureau estimates Montezuma County had 26,678 residents on July 1, 2025, ranking #1,597 of 3,222 county equivalents. That is 13 people per square mile of land.
What is the county seat of Montezuma County?
The county seat of Montezuma County is Cortez.
What cities and towns are in Montezuma County?
Montezuma County has 3 incorporated places. The most populous are Cortez city, Mancos town, and Dolores town; 15,353 residents live outside any incorporated place.
Is Montezuma County part of a metropolitan area?
No. Montezuma County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.
How many ZIP codes are in Montezuma County?
8 ZIP Code Tabulation Areas have land in Montezuma County, and 7 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Montezuma 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 Montezuma County?
The land measurement converts to approximately 1,298,783 acres. Including water, total area is approximately 1,305,507 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.