| Intellius | Intellius is the nation's most popular background search firm and has been around longer than anyone in the game. | |
| Colorado Department of Corrections | This website allows the public to perform an inmate search. Find the location and release information of individuals incarcerated with the state Department of Corrections. | |
| List of Inmate Escapees | The Colorado Department of Corrections list of individuals who have left a Colorado Department of Corrections facility without authorization. | |
| Colorado Licenses | Search for professionals licensed within the state of Colorado for various practices. This website is sponsored by the Office of Economic Development and International Trade. | |
| Marriage and Divorce Search | Search for official Marriage and Divorce certificates within the state of Colorado. Marriage records for Colorado are available for the following years: 1900 to 1939, and 1975 to the present. Verifications for 1940 to 1974 are not available from this website however, and they must be obtained from the specific county where the license was obtained. The person named on the record, the immediate family, and others demonstrating a direct and tangible interest in the record may request a copy. | |
| Colorado Property Records | The Colorado Assessor's Association lists official property records for the state. | |
| Colorado Unclaimed Property | This website is sponsored by the official state government treasurer. It allows public individuals to search for unclaimed property within the state of Colorado. | |