A referendum on a draft constitution was held in the Cayman Islands on 20 May 2009 alongside general elections.

[1] On 22 May 2008 the Caymanian government had announced the question and that it was aiming to hold the referendum in July.

[1] However, following an announcement on 27 June, the referendum was postponed until the 2009 general elections in order to give time to negotiate and agree the constitution with the UK.

On 24 February the Legislative Assembly passed the Referendum (Constitutional Modernisation) Bill, 2009.

The referendum was to be held in accordance with Article 29, paragraph 2 of the constitution, and required a majority to pass.