A constitutional referendum was held in Western Samoa on 12 November 1990.

Voters were asked whether they approved of the introduction of universal suffrage and a second chamber of Parliament.

The first change was approved by 52.6% of voters, but the second opposed by 60.7%.

Voter turnout was 74.3% for the first question and 73.7% for the second.

[1] Although universal suffrage was introduced, candidates in elections still had to be part of the Matai.