Mesa County area

Population and density of Mesa County

The Census Bureau estimates that 162,845 people lived in Mesa County on July 1, 2025. That ranks #433 of 3,222 county equivalents nationally and #11 of 64 in Colorado. Since the April 1, 2020 estimates base of 155,710, the population has grown by 7,135 (+4.6%), compared with +4.1% for Colorado as a whole.

With 3,328.7 square miles of land, that is 49 people per square mile (19 per km²), placing Mesa County #1,574 nationally for density and #13 in Colorado. The median county equivalent has 47 people per square mile; the Colorado median is 11. Put another way, there are about 13 acres of land per resident.

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 Mesa County

5 incorporated places lie at least partly in Mesa County. Together they are home to 89,260 people (54.8%); the other 73,585 (45.2%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Grand Junction city, with 71,827 residents in the county. Among places with at least 1,000 residents in 2020, Grand Junction city grew fastest since then (+9.4%).

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Mesa County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Mesa County is a central county of the Grand Junction, CO Metropolitan Statistical Area. Mesa County is the area’s only county equivalent, so the metro area has the same 3,328.7 square miles of land. By combined land it ranks #89 of 393 metropolitan areas, and #273 by population.

ZIP codes

19 ZIP Code Tabulation Areas have land in Mesa County; 17 of them have most of their land inside the county, and the others mainly cover neighboring areas.

81501815038150481505815068150781520815218152281523815248152581526815278162481630816358164381646

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 Mesa County

Mesa County shares a land border with 6 county equivalents, including 1 in Utah. It has more land than 5 of them. The largest neighbor is Grand County (3,672.9 mi²) and the smallest is Pitkin County (970.7 mi²). Together with its neighbors, Mesa County forms a block of 17,541.9 mi² of land, of which it holds 19%.

How big is Mesa County compared with U.S. states?

Mesa County has more land than 2 of the 50 states. It is about 1.7 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 1.5 times as much land (4,842.5 mi²). Colorado’s county land could hold about 31 areas the size of Mesa County.

Another way to picture it: the same land area would fill a square about 57.7 miles (92.9 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 Mesa County?

Mesa County has more land than 3,070 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 Mesa County at #163 nationally by total area, 11 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 0.4%, compared with a national county-equivalent median of 1.2% — 0.8 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 Mesa County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

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.