Why Colorado's County Lines Tell Stories Of Growth And Change

As you're zipping across Colorado chasing mountain views, green chile cheeseburgers, or that next small-town festival, I’m willing to bet you’re not thinking, “Wow, I just crossed into a new county.”

You probably blew right past the sign.

Most counties give you a polite little heads up on the side of the highway. Sometimes the only giveaway is a different sheriff’s cruiser parked in the median. Blink, and you missed it. Counties here can change faster than the weather.

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But those lines on the map? They matter. They tell the story of how Colorado grew up.

Before we had 64 counties, before interstates stitched the state together, Colorado started with just 17 original counties when it officially became a state in 1876.

Back then, transportation was slower, populations were scattered, and county lines covered massive stretches of land. What feels like a quick Sunday drive today could have been a multi-day journey on horseback.

👇🏻 Keep Scrolling to Learn About Colorado's Original 17 Counties 👇🏻

These are the Original 17 Counties When Colorado Became a Territory

Before Colorado became a state, the territory was divided into 17 original counties.

For the most part, those original 17 remain counties—however, they may look a bit different—there's one that no longer exists. Guadalupe County turned into Conejos County just six days after its creation.

Please scroll through the original Colorado counties, and discover how they got their names.

Gallery Credit: Tim Gray

As mining camps boomed, railroads expanded, and towns began to plant real roots, those original counties were carved up. Residents wanted government services closer to home. Courts, law enforcement, and record keeping. You couldn’t realistically run a fast-growing region from one faraway county seat forever.

So the map kept changing.

👇🏻 Keep Scrolling to Learn About the Expansion of Colorado Counties 👇🏻

Colorado's Counties Split Amist State Growth and Riches

In 1866, new counties began to emerge as Colorado grew. 10 new counties formed or merged from the original counties.

Once Colorado made statehood in 1876, there were only 26 counties.

After statehood, however, six new counties were created up to 1881.

The following counties were formed from the originals, from 1886 through 1881:

Gallery Credit: Tim Gray

And here’s something most folks don’t realize. Colorado hasn’t always been adding counties at a steady pace. In fact, it has been a long time since a brand-new one showed up on the map.

👇🏻 Keep Scrolling to Find Out When the Newest Colorado County Was Created 👇🏻

Colorado Counties Continue to Form Through Modern Dates

After Colorado's statehood growth, the Centennial State grew to the west.

In 1883, much of Colorado's Western Slope began to break off into their counties starting with Garfield through San Miguel.

Small counties began popping up throughout the state breaking off from some of the original Colorado Counties or a combination of new and old.

The newest county created in Colorado was Broomfield in 2001.

Gallery Credit: Tim Gray

Next time you cross one of those county lines, maybe give it a second glance. You’re not just entering a new jurisdiction. You’re rolling into another chapter of Colorado’s story.

Source: From 17 to 64: How Mining Camps and Horseback Rides Carved Up the Map of Colorado

Filed Under: Colorado History, gallery

Categories: Articles, Colorado Local

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