Colorado 1870
Center of Southwest Studies, Fort Lewis College, Durango, Colorado La Plata County, Colorado, Marriages records inventory, from 1877 to 1959
Colorado’s Historic Newspaper Collection statewide historical newspaper database, from 1859 to 1923
Colorado State Archives historical records database containing nearly 100 indexes with nearly 300,000 individual entries
Denver Public Library Western History/Genealogy Collection Colorado marriage and divorce index, Denver obituary index, mining fatalities, state reformatory records
Foothills Genealogical Society searchable databases of Jefferson County marriages, obituaries, residents, funeral records, WWI draft registration and naturalization