Colorado and Wyoming look almost identical on a map — same rectangular shape, same Rocky Mountain spine, same dry interior climate, and nearly the same size. Yet Colorado is home to over 5.8 million people while Wyoming barely scrapes past 580,000. That means Colorado is roughly nine times more densely populated than its neighbor to the north. So why is Wyoming so empty compared to Colorado? The answer stretches back over 150 years and involves gold rushes, Cold War paranoia, satellite technology, and one very strategic airport.
00:45
Side-by-side comparison of Colorado and Wyoming showing their nearly identical rectangular shapes and Rocky Mountain geography
Watch at 00:45 →
Why Is Wyoming the Least Populated State in the US?
Wyoming isn't just sparsely populated by American standards — it's sparsely populated by global standards. With an average population density of just 2.3 people per square kilometer, Wyoming is emptier than Australia and Namibia, two countries that are largely covered in uninhabitable desert. The only place in Europe with a comparable emptiness is Lapland in Finland — and that region sits inside the Arctic Circle, where winters last seven months of the year.
Wyoming is the 10th largest state by area, yet it holds the absolute smallest population of all 50 states — by a wide margin. There are 119 individual counties in the United States with more people than the entire state of Wyoming. There are 29 American cities with larger populations than Wyoming, including Memphis, Tennessee. The mayors of those 29 cities each govern more people than Wyoming's own governor does.
Wyoming doesn't even have a real city to speak of. Its largest settlement, Cheyenne, has a population of just 63,000 — roughly the same as the 143rd largest city in California. And Cheyenne is located in the far southeastern corner of the state, less than 10 miles from the Colorado border, functioning more as a satellite of Denver than a true Wyoming hub.
03:10
Population density comparison showing Wyoming is emptier than Australia and Namibia
Watch at 03:10 →
Why Did Colorado's Population Explode While Wyoming's Stagnated?
The divergence between these two states begins in the 1850s — with gold. Gold was discovered along the South Platte River in what would become Colorado in 1858, triggering a full-blown gold rush that flooded the territory with settlers almost overnight. Wyoming's mountains simply never offered the same quantities of gold and silver, so they never received that same early population surge.
Colorado's subsequent discoveries of copper, lead, and coal brought even more miners, eventually leading to statehood in 1876 — a full 14 years before Wyoming achieved statehood in 1890. By 1900, Colorado already had 539,000 residents. That's comparable to what Wyoming's entire population looks like today, over 120 years later.
Colorado also has a geographic advantage that's easy to overlook: more flat, developable land. The Rocky Mountains occupy a larger share of Wyoming's total territory, while the Great Plains extend across roughly 40 percent of eastern Colorado — giving Colorado's early settlers more room to farm, build, and expand. Colorado's Front Range cities — Denver, Fort Collins, Colorado Springs, Pueblo — also sit at slightly lower latitudes, meaning marginally warmer average temperatures year-round, which makes settlement more attractive.
05:30
Topographical map overlay showing how the Rockies consume a larger share of Wyoming's territory versus Colorado's
Watch at 05:30 →
Why Does Colorado Have So Many Federal Government Offices?
The real turning point for Colorado came during World War II. Concerned about potential enemy attacks on the American coasts, the U.S. federal government began relocating key offices and agencies into the interior of the country. Colorado's central location and excellent rail access made it a prime destination for these relocations. By the end of the 1940s, Colorado had more federal government offices than anywhere in the country outside Washington, D.C.
During the Cold War, Colorado's importance only grew. Major federal institutions established permanent headquarters there, including:
- NORAD and the Air Force Academy in Colorado Springs
- NOAA and NCAR in Boulder
- The U.S. Geological Survey in Denver
These relocations brought thousands of government employees and their families into the state, diversifying Colorado's economy well beyond mining and agriculture — a transformation that never happened in Wyoming.
What Is Wyoming's Economy Based On — And Why Does It Matter?
Wyoming's economy today looks remarkably similar to what it looked like 100 years ago. It remains heavily dependent on mining, oil and gas extraction, and ranching. While tourism tied to Yellowstone and Grand Teton National Parks brings in nearly a billion dollars annually, tourism doesn't generate the kind of sustained population growth or industry diversification that transforms a territory into a thriving, self-sustaining economy.
The consequences of this are stark. Wyoming's population is uniquely vulnerable to boom-and-bust cycles in global commodity prices. During the 1970s oil boom, Wyoming's population exploded as roughnecks flooded in for work. When oil prices crashed in the 1980s, Wyoming actually experienced negative population growth — more people left than arrived or were born. The fracking revolution of the 2010s redirected oil industry investment to Texas and North Dakota, leaving Wyoming stagnant again throughout that entire decade.
09:15
Chart showing Wyoming's boom-and-bust population cycles tied to oil price swings versus Colorado's steady growth curve
Watch at 09:15 →
Colorado, by contrast, has never experienced a decade of population decline since becoming a state. Its diversified economy — spanning government, aerospace, telecom, education, and tech — acts as a buffer against any single industry's collapse.
How Isolated Is Denver From Other Major US Cities?
Here's something that surprises most people: despite being a massive metro area of nearly 3 million people, Denver is actually the most isolated of all America's top 30 largest cities. The nearest comparable population center is El Paso, Texas — about 560 miles away. That's roughly the same distance as London to Milan.
But this isolation turned out to be a feature, not a bug. Denver's location on the 105th Meridian West and its elevation of over one mile above sea level make it the largest city in America capable of offering a one-bounce, real-time satellite uplink to all six inhabited continents within a single business day. Its position in the Mountain Time Zone also allows communication with both U.S. coasts, South America, Europe, and Asia — all within the same working day.
This is why major telecom companies like Comcast, Dish, and Qwest all chose to establish large operations and even headquarters in the Denver metro area. Today, Colorado is home to 10 Fortune 500 companies. Wyoming has zero.
Denver International Airport: A Catalyst for Even More Growth
Denver's strategic geography also gave rise to Denver International Airport, which opened in 1995 and has since become one of the most important aviation hubs on the planet. In both 2021 and 2022, DIA ranked as the third busiest airport in the world by passenger traffic, trailing only Atlanta and Dallas-Fort Worth. The airport serves more than 215 non-stop global destinations across both Americas, Europe, and Asia.
Compare that to Wyoming's largest airport, which offers exactly two scheduled passenger routes: one to Salt Lake City and one to Denver. From a transportation perspective, Wyoming's towns functionally operate as satellites of Colorado — getting out of Wyoming by air almost always means flying into Denver first.
Education, Aerospace, and the Feedback Loop
Colorado's advantages kept compounding. The state has 42 public four-year colleges and universities — Wyoming has one. Colorado's strong federal aerospace presence attracted private aerospace giants including Lockheed Martin, Raytheon, Boeing, Northrop Grumman, Ball, and Maxar, collectively employing over 240,000 Coloradans and making the state home to the largest private aerospace economy per capita in America. More jobs attracted more people, which attracted more businesses, which created more jobs — a self-reinforcing cycle Wyoming was never able to initiate.
Will Wyoming's Population Ever Grow? What the Future Looks Like
By 2050, Colorado's population is projected to roughly double to somewhere between 8.6 and 10 million people, driven largely by migration from California and Texas. Wyoming's future is far less certain — and for most people who actually live there, that's perfectly fine.
Wyoming remains one of the last genuine frontiers in the continental United States — a vast, quiet, spectacularly beautiful landscape where you can travel for miles without encountering another person. Its residents tend to value exactly that. Wide open space, low taxes, low crime, and freedom from the noise of modern American capitalism are features, not bugs, of Wyoming life.
The divergence between Colorado and Wyoming isn't really a story of one state winning and another losing. It's a story of two places that started from nearly identical circumstances and — through a combination of historical timing, geography, federal policy, and economic diversification — ended up serving completely different roles in the American story. One became a booming, cosmopolitan hub. The other became the last quiet place.
