Elevation

Elevation of Longmont

4,980ft

above sea level · 1,518 m

Longmont is a city in Colorado with 100,109 people, the 14th most populous in the state. Of the 249 US cities with 100,000 to 250,000 people, it’s the 8th highest.

By the Mapsfera Team

Elevation profile

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Place facts

Coordinates: 40.17° N · 105.10° W; In degrees, minutes and seconds: 40° 10′ 2″ N · 105° 6′ 7″ W
UTM coordinates: 13T · 491,321 E · 4,446,321 N; Zone 13 · NAD83, the official US datum
County: Boulder County; The city spans 2 counties; its reference point is in this one
State: Colorado; CO · capital: Denver
Time zone: Mountain Time; UTC−7 · UTC−6 in summer (daylight saving time)
Population (2025): 100,109 people; 29.3 sq mi of land · 3,419 people/sq mi
Elevation model: USGS 3DEP, 1 m grid; Lidar from February 2021: the ground height at the city’s reference point.

Population

Longmont had 100,109 residents on July 1, 2025, according to Census Bureau estimates, 1.2% more than in April 2020, when it had 98,900. Its 29.3 sq mi of land work out to 3,419 people/sq mi; the state average is 58 people/sq mi.

It’s the 14th most populous of the 482 places the Census counts in Colorado (cities, towns and CDPs), after Denver (740,613), and holds 1.7% of the state’s population.

The city spreads across 2 counties. By population: Boulder County (98,807) and Weld County (1,302). Its reference point, where we measure the elevation, is in Boulder County.

Compared with US cities of 100,000 to 250,000

Longmont sits at 4,980 ft (1,518 m) above sea level. Of the 249 US cities with 100,000 to 250,000 people, the highest is Lakewood (5,520 ft) and the lowest is Fort Lauderdale (3 ft). The average is 862 ft: Longmont is 4,118 ft above it.

The state capital, Denver, is 30 mi away in a straight line and 296 ft higher than Longmont.

Of the 12 cities in Colorado with a page, Longmont is the 3rd lowest: the highest is Colorado Springs (6,009 ft) and the lowest is Greeley (4,674 ft).

The highest point in Colorado is Mount Elbert, at 14,433 ft according to the USGS: 9,453 ft above Longmont, 102 mi away in a straight line.

6 Rio Rancho 5,277 ft
7 Fort Collins 5,004 ft
8 Longmont 4,980 ft
9 Pueblo 4,693 ft
10 Greeley 4,674 ft

Each color band is 500 m (1,640 ft), the same colors as the map. See the full list

Nearest cities with a page

Tools for this place

Elevation profile Draw a route from Longmont and see how much it climbs and drops. Elevation of a point Compare the elevation of Longmont with any other point on the map. Map of Boulder County The county on the map with all its cities and towns, ready to print or download. Time zone The time right now in Longmont and its clock changes. What county am I in? See which county, city and ZIP code you’re in, from your location. Blank map of Colorado counties Print it blank, with names or to color in.

Frequently asked questions

What people most often ask about the elevation of Longmont.

What is the elevation of Longmont?

Longmont is 4,980 feet (1,518 m) above sea level. That’s the ground height from the USGS 3DEP elevation model at the city’s reference point in the official gazetteer (GNIS). The city doesn’t have a single elevation: it rises and falls from one neighborhood to another.

What are the coordinates of Longmont?

Latitude 40.16721 and longitude -105.10193, in decimal degrees (40° 10′ 2″ N · 105° 6′ 7″ W). In UTM, zone 13: 491,321 E and 4,446,321 N, on NAD83.

How does Longmont rank among the highest US cities of its size?

It’s the 8th highest of the 249 US cities with 100,000 to 250,000 people. The highest is Lakewood (5,520 ft) and the lowest is Fort Lauderdale (3 ft).

What county is Longmont in?

Several: Boulder County and Weld County. Most of its people live in Boulder County.

Which is higher, Longmont or Denver?

Denver. Longmont sits at 4,980 ft and Denver at 5,276 ft: a difference of 296 ft, 30 mi apart in a straight line.

How is elevation measured?

Elevation is the height above mean sea level. In the US the official reference is the NAVD88 vertical datum. Summits are surveyed on the ground, with leveling and precise GPS. The USGS 3DEP is an elevation model of the whole country, largely from 1-meter lidar: it gives the ground height at every point. That’s why it can differ by a few feet from the official figure of a sharp summit.

Sources

USGS 3DEP (EPQS service) The elevation: the ground height at the reference point. Public domain.
USGS GNIS (official gazetteer) The city’s reference point (“Populated Place”). Public domain.
U.S. Census Bureau, Vintage 2025 estimates Population, land area (2025 Gazetteer) and counties. Public domain.
TIGERweb (U.S. Census Bureau) Which county and city the point falls in. Public domain.
Terrain Tiles, OpenStreetMap and OpenFreeMap The relief shading and the base map (ODbL).

Methodology and sources · Spotted a mistake? Let us know