Cities near Boulder
Boulder is a city of 106,803 inhabitants in United States. The most populous cities near Boulder within 100 km are Denver, Aurora, Fort Collins. Distances are measured as the crow flies.
Use the map and table below to explore the cities near Boulder.
Map
The dashed circle shows the selected radius. Click a marker for details.
Nearby cities 45 cities found
Sorted by population, from largest to smallest. Distances are measured as the crow flies.
| City | Country | Distance | Population |
|---|---|---|---|
| Denver | United States | 39.2 km | 729,019 |
| Aurora | United States | 49.1 km | 359,407 |
| Fort Collins | United States | 65.3 km | 170,924 |
| Lakewood | United States | 38.1 km | 152,597 |
| Thornton | United States | 30.3 km | 133,451 |
| Westminster | United States | 28.1 km | 116,317 |
| Arvada | United States | 28.3 km | 115,368 |
| Centennial | United States | 59.0 km | 109,741 |
| Greeley | United States | 65.8 km | 108,795 |
| Highlands Ranch | United States | 57.4 km | 96,713 |
| Longmont | United States | 22.2 km | 92,088 |
| Loveland | United States | 45.7 km | 75,182 |
| Broomfield | United States | 18.9 km | 65,065 |
| Castle Rock | United States | 79.8 km | 55,591 |
| Commerce City | United States | 36.8 km | 53,696 |
| Parker | United States | 70.3 km | 49,550 |
| Littleton | United States | 49.6 km | 46,368 |
| Southglenn | United States | 54.8 km | 42,268 |
| Northglenn | United States | 28.1 km | 39,197 |
| Brighton | United States | 38.5 km | 37,585 |
| Dakota Ridge | United States | 45.7 km | 33,892 |
| Englewood | United States | 47.4 km | 33,082 |
| Windsor | United States | 60.2 km | 32,716 |
| Ken Caryl | United States | 50.7 km | 32,438 |
| Wheat Ridge | United States | 32.2 km | 31,192 |
| Lafayette | United States | 15.6 km | 27,729 |
| Castlewood | United States | 57.3 km | 25,271 |
| Columbine | United States | 50.5 km | 24,280 |
| Erie | United States | 19.2 km | 21,420 |
| Evans | United States | 63.5 km | 21,383 |
| Louisville | United States | 12.5 km | 20,396 |
| Golden | United States | 29.2 km | 20,330 |
| Sherrelwood | United States | 30.3 km | 18,287 |
| Greenwood Village | United States | 52.0 km | 15,663 |
| Johnstown | United States | 47.0 km | 14,896 |
| Welby | United States | 33.1 km | 14,846 |
| Lone Tree | United States | 61.1 km | 13,175 |
| Superior | United States | 11.1 km | 12,980 |
| Federal Heights | United States | 29.5 km | 12,381 |
| Firestone | United States | 30.4 km | 11,999 |
| Frederick | United States | 29.9 km | 11,413 |
| Berkley | United States | 31.4 km | 11,207 |
| Cherry Creek | United States | 56.9 km | 11,120 |
| The Pinery | United States | 77.3 km | 10,517 |
| Castle Pines North | United States | 68.4 km | 10,360 |
What is this tool?
The Cities Near tool lets you explore all populated places within a chosen radius of any city in the world. Enter a city, pick a radius (50, 100, 200, or 500 km), and get an instant interactive map and list — sorted from most to least populous.
This is useful for trip planning, geography research, or simply satisfying your curiosity about what lies around a given city. The underlying dataset comes from GeoNames and covers 70,000+ populated places worldwide.
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How far is Boulder from other cities?
Use the form below to find the distance from Boulder to any other city in the world.
How does the distance calculation work?
Distances are calculated using the Haversine formula, which gives the great-circle distance between two points on a sphere — the shortest path over the Earth's surface. The result is accurate to within a few kilometres for most city pairs. Note that the Haversine formula assumes a perfectly spherical Earth; the true Earth is slightly flattened, so very long distances may differ by up to 0.5% from the exact geodetic distance.
Cities near famous places
- Within 100 km of Paris: Versailles, Chartres, Reims, Rouen — all classic day-trip destinations.
- Within 200 km of Tokyo: Yokohama, Kawasaki, Sagamihara, Chiba, Shizuoka — the vast Kantō metropolitan area.
- Within 500 km of Istanbul: Ankara, Bursa, Thessaloniki, Sofia, Izmir — crossing into three countries.
Frequently Asked Questions
What is the maximum radius I can search?
The tool offers radii of 50, 100, 200, and 500 km. For reference, a 500 km radius around Paris would cover most of France plus parts of Belgium, Germany, and Switzerland. Use the minimum population filter to narrow down the results to cities of the size you care about.
How is distance measured — straight line or road distance?
The distance shown is the straight-line great-circle distance (as the crow flies), not the road distance. Road distances are always longer due to routes, terrain, and urban layouts. This tool is intended for geographic exploration, not navigation.
What data source is used?
City data comes from the GeoNames geographical database, which aggregates official government sources worldwide. It includes name, coordinates, population, country, and timezone for over 70,000 populated places. Coordinates are accurate to 4–6 decimal places.