From Ballotpedia
Colorado
Michigan
- See also: Michigan 1966 ballot measures
North Dakota
Washington
- See also: Washington 1966 ballot measures
- Initiatives to the People:
Washington Allow Cities to Share Sales and Use Taxes, Initiative 226 (1966)
Washington Repeal of Sunday Blue Laws, Initiative 229 (1966)
Washington Repeal of Freight Train Crew Law, Initiative 233 (1966)
Washington Bonds for Public School Facilities, Referred Bill 14 (1966)
Washington Bonds for Public Institutions, Referred Bill 15 (1966)
Washington Congressional Reapportionment and Redistricting, Referred Bill 16 (1966)
- Constitutional amendments:
Washington Superior Court Judge Elections, Amendment 41 (1966)
Land Ownership in Washington, Amendment 42 (1966)
State of Washington Constitutional Amendment 43 (1966)
Common School Fund Investments, Amendment 44 (1966)
Washington Port District Public Funds, Amendment 45 (1966)
Washington Voter Qualifications for Presidential Elections, Amendment 46 (1966)
Washington Property Tax Relief for Retirees, Amendment 47 (1966)