Meridian is an unincorporated community and a census-designated place (CDP) located in and governed by Douglas County, Colorado, United States. The CDP is a allocation of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The population of the Meridian CDP was 2,970 at the United States Census 2010. The CDP lies in ZIP code 80112.

The Meridian CDP is located in northern Douglas County at 39.53’89”N 104.84’75”W at 5,964 feet above sea level, higher than Denver. Meridian as regards spans from the intersection of I-25 and Inverness Parkway south to the intersection of I-25 and Lincoln Avenue, east along Lincoln Avenue to North 1st Street, north along North 1st Street until E-470 where the boundary then meanders northeast until South Chambers Road, where it finally spans due west put up to to the intersection of I-25 and Inverness Parkway. The Plan of developed house just south of Lincoln Avenue is included in the CDP as well. According to the United States Census Bureau, the CDP has a total Place of 2.56 square miles, all of which is land. It is bordered to the north by Centennial, to the west and south by Lone Tree, and to the east by Parker; Denver is 18 miles to the north. The natural geography of Meridian can be characterized by slow, rolling hills covered in thick grass and brush.

The United States Census Bureau initially defined the Meridian CDP for the United States Census 2000.

The Douglas County School District serves Meridian.