Colorado State Archives - They offer a wide variety of research in their abundant records. This includes a statewide divorce index (1890-1939), Declarations of Intention (1915-1968), and Final Papers (1915-1991).
Colorado Department of Public Health and Environment - Here is a site where you can order birth, death, marriage, and divorce records. This site includes a searchable online marriage and divorce index database covering the last 25 years.
Colorado Genealogical Society research - This site accepts lookup requests for a variety of years and records, including censuses and vital records. Fees included.
