Welby is an unincorporated community and a census-designated place (CDP) located in and governed by Adams County, Colorado, United States. The CDP is a part of the DenverâÂÂAuroraâÂÂLakewood, CO Metropolitan Statistical Area. The population of the Welby CDP was 15,553 at the 2020 United States census.
The community was named after one General Welby, a railroad official.
The Welby CDP has an area of , including of water.
The United States Census Bureau initially defined the for the