El Paso County is a county located in the U.S. state of Colorado. The 2020 Census recorded its population as 730,395. The Census Bureau's 2020 result indicates it is the most populous county in Colorado, surpassing the City and County of Denver. The county seat is Colorado Springs, the second most populous city in Colorado. El Paso County is included in the Colorado Springs, Colorado, Metropolitan Statistical Area and is located in Colorado's 5th congressional district, except for the far eastern extremities, which are located in the 4th.
The Air Force Academy is a census-designated place (CDP) located in El Paso County, Colorado, United States. The CDP includes the developed portion of the United States Air Force Academy, including the cadet housing facilities. The CDP is a part of the Colorado Springs, CO Metropolitan Statistical Area. The USAF Academy post office (ZIP Codes 80840 and 80841 serves the area. At the United States Census 2020, the population of the Air Force Academy CDP was 6,680.
The Town of Calhan is a statutory town located in El Paso County, Colorado, United States. The town population was 762 at the 2020 United States Census. Calhan is a part of the Colorado Springs, CO Metropolitan Statistical Area and the Front Range Urban Corridor. The town straddles U.S. Highway 24. With Calhan sitting at an elevation of 6,535 feet above sea level, Calhan is the highest non-mountain town in the United States. It is the site of the Calhan Paint Mines Archeological District, a popular natural attraction.
Woodmoor is an unincorporated community and a census-designated place (CDP) located in and governed by El Paso County, Colorado, United States. The CDP is a part of the Colorado Springs, CO Metropolitan Statistical Area. The population of the Woodmoor CDP was 9,536 at the United States Census 2020. The Monument post office serves the area.
Williamsburg is a statutory town located in Fremont County, Colorado, United States. The town population was 731 at the 2020 census. The Florence post office serves Williamsburg.
The Town of Eaton is a Statutory Town located in Weld County, Colorado, United States. The town population was 5,802 at the 2020 United States Census, a +32.92% increase since the 2010 United States Census. Eaton is a part of the Greeley, CO Metropolitan Statistical Area and the Front Range Urban Corridor.
The Town of Hudson is a home rule municipality in Weld County, Colorado, United States. The population was 1,651 at the 2020 census.
Pierce is a Statutory Town in Weld County, Colorado, United States. The population was 1,097 at the 2020 census. The town is a rural agricultural community located on the Colorado Eastern Plains along U.S. Highway 85 north of Greeley.
Security-Widefield is a census-designated place (CDP) comprising the unincorporated communities of Security and Widefield located in and governed by El Paso County, Colorado, United States. The CDP is a part of the Colorado Springs, CO Metropolitan Statistical Area. The population of the Security-Widefield CDP was 38,639 at the United States Census 2020. El Paso County governs the unincorporated communities. Both the Colorado Springs post office and the Fountain post office serve the area.
Cimarron is an unincorporated rural hamlet in Montrose County, Colorado, United States. It is located on the northern side of U.S. Highway 50, 19 miles from the town of Montrose to its west, and 42 miles from Gunnison, Colorado to its east. There is a store with fuel pumps and a post office at Cimarron. The post office services the rural ZIP Code 81220 area.
Arlington is an unincorporated community and U.S. Post Office in Kiowa County, Colorado, United States. The ZIP Code of the Arlington Post Office is 81021.
Carr is an unincorporated community that used to have a U.S. Post Office in Weld County, Colorado, United States. The ZIP Code of Carr is 80612. Some consider Carr a ghost town. Today, a few old houses remain plus a church and the schoolhouse, but the old store fronts are gone. There are some scattered old foundations throughout the town. There are a growing number of year-round residents, so the town no longer appears abandoned.
Roggen is an unincorporated community and a U.S. Post Office in Weld County, Colorado, United States. The Roggen Post Office has the ZIP Code 80652.
Yoder is an unincorporated community and a U.S. Post Office located in El Paso County, Colorado, United States. The Yoder Post Office has the ZIP Code 80864.
Delhi is an unincorporated community in Las Animas County, Colorado, United States. The U.S. Post Office at Model now serves Delhi postal addresses.
North Avondale is an unincorporated community in Pueblo County, Colorado, United States. The U.S. Post Office at Avondale now serves North Avondale postal addresses.
Sopris was an unincorporated community located in Las Animas County, Colorado, United States. The town is now under the surface of Trinidad Lake in Trinidad Lake State Park.
Ellicott is an unincorporated community and a census-designated place (CDP) located in and governed by El Paso County, Colorado, United States. The CDP is a part of the Colorado Springs, CO Metropolitan Statistical Area. The population of the Ellicott CDP was 1,248 at the United States Census 2020. The Calhan post office serves the area.
Prospect Valley is a populated place in Weld County, Colorado, United States. The Post Office at Keenesburg serves the Prospect Valley postal address. SH 52 runs east and west through the community.
The Town of Green Mountain Falls is a Statutory Town located in El Paso and Teller counties of the U.S. of State of Colorado. The town population was 646 at the 2020 United States Census with 622 residents in El Paso County and 24 residents in Teller County. Green Mountain Falls is a part of the Colorado Springs, CO Metropolitan Statistical Area and the Front Range Urban Corridor.
United States 
State of Colorado 
