Colorado Borders: States, Map & Complete Guide

Wyoming and Colorado are separated by a border located on Colorado's northern edge. The state line follows the 41st parallel north latitude, creating a perfectly straight east-west boundary across the top of Colorado.

The Colorado-Wyoming border extends for about 276 miles from the Utah state line in the west to the Nebraska state line in the east. Colorado counties along this border include Moffat, Routt, Jackson, and Larimer. On the Wyoming side, border counties include Sweetwater, Carbon, Albany, and Laramie.

Nebraska and Colorado share a short border in Colorado's northeast corner. This border runs along the 41st parallel north latitude, continuing the straight line from the Wyoming border.

The Colorado-Nebraska border is about 205 miles long, running from Wyoming in the west to Kansas in the east. Sedgwick, Phillips, and Yuma counties in Colorado are situated along this border. On the Nebraska side, border counties include Kimball, Cheyenne, and Dundy.

Kansas and Colorado are separated by a border located on Colorado's eastern side. The boundary follows the 25th meridian west (102nd meridian west of Greenwich), creating a straight north-south line.

This border extends for about 210 miles from Nebraska in the north to Oklahoma in the south. Colorado counties along this border include Yuma, Kit Carson, Cheyenne, Kiowa, Prowers, and Baca. The Kansas side includes Cheyenne, Sherman, Wallace, Greeley, Hamilton, and Stanton counties.

Oklahoma and Colorado share Colorado's shortest state border, located at the southeast corner where the two states meet. This border is often called the Oklahoma Panhandle border.

The Colorado-Oklahoma border runs for only about 40 miles along the 37th parallel north. Only Baca County in Colorado touches this border, while Cimarron County in Oklahoma sits on the other side. This small border section connects Kansas to the east with New Mexico to the west.

New Mexico and Colorado are separated by a border located on Colorado's southern edge. The state line follows the 37th parallel north latitude, creating a straight east-west boundary.

The Colorado-New Mexico border extends for about 389 miles from Arizona in the west to Oklahoma in the east. Colorado counties along this border include La Plata, Archuleta, Conejos, Costilla, Las Animas, and Baca. On the New Mexico side, border counties include San Juan, Rio Arriba, Taos, Colfax, and Union.

Arizona and Colorado meet at a single point in Colorado's southwest corner. This intersection is called Four Corners, where Colorado, Arizona, New Mexico, and Utah all touch.

This is not a traditional border but rather a quadripoint—the only place in the United States where four states meet at one spot. A monument marks the exact location. While Arizona and Colorado don't share a border line, they do share this unique geographic point at 36°59'56.3"N 109°02'42.6"W.

Utah and Colorado are separated by a border located on Colorado's western edge. The boundary follows the 32nd meridian west (109th meridian west of Greenwich), creating a straight north-south line.

The Colorado-Utah border extends for about 277 miles from Wyoming in the north to the Four Corners point in the south. Colorado counties along this border include Moffat, Rio Blanco, Garfield, Mesa, Montrose, San Miguel, Dolores, and La Plata. Major features include Dinosaur National Monument in the north and Canyonlands region in the south.