527,000 digitized images of Cascade County records are now available for browsing at the Family Search website. 

All digitized images are now available - continue reading to view list........

• Birth index (1893-1933)
• Death index (1895-1907)
• Marriage records (1950-1958)
• Military rolls (1896-1911)
• Court Orders for Dependent Children (1903-1937)
• Old Age Pension Applications
• Naturalization Records (1888-1945)
• School Census (1888-1955)
• Probate Files (1913-1926)
• Voter Registers (1888-1955)
• Voter Registration Cards (1937-1986)
• Great Falls Tribune Vital Records
• Assorted Obituary Collections
• Tax Records
• Burials

More information on the record content can be found at the Family Search Wiki site. 

Original records are located at the Great Falls Genealogy Library and at The History Museum in Great Falls.