Colorado. County commissioners Clark A. Buckler, new executive director of Colorado Association of County Commissioners, Jan. 1, 1972. RMN D 22, 1971 p.43 Need stronger legislation to protect land in unincorporated areas. Post D 19, 1971 p.45 If a county has a population of less than 70,000 -- 3 commissioners are required. If a county has a population of over 70,000 -- the num- ber of commissioners will vary from 3 to a maximum of 5. Per 1970 :Colorado Constitution 0