National Archives - Rocky Mountain Region has acquired the microfilm series M1775, Internal Revenue Service Tax Assessment Lists for Colorado and Wyoming, 1873-1918. There are seven rolls of Colorado records consisting of:

  • Assessment Lists
  • Alphabetical Lists of Individuals and Withholding Agent Liable to Income Tax under Sec. 2, Act of October 3, 1913
  • Assessment List of Banks and Bankers Special Assessment List of Corporations, Joint Stock Companies, Etc., Taxable under Section 38, Act of August 5, 1909

For specific information about each roll go to http://www.archives.gov/genealogy/microfilm/2005.html

For information concerning location and hours for National Archives - Rocky Mountain Region, go to http://www.archives.gov/rocky-mountain/