Colorado Referendum 1 was a legislatively-referred constitutional amendment to Article IV, on the November 5, 1968 election ballot in Colorado, where it was adopted.
| Colorado question 2 (1968)|
| Yes|| 428,522|| 67.7%|
Election Results via: The Colorado Legislative Council
Text of measure
The language that appeared on the ballot:
|| An Amendment to Article IV of the Constitution of the State of Colorado, providing for the election of the Governor and Lieutenant Governor jointly by the casting by each voter of a single vote applicable to both offices.