With a Doodle account:
Log into your account, and click on the poll from your Dashboard. Click on 'more' at the top of the page and then 'delete poll'.
Log into your account, and click on the poll from your Dashboard. Click on 'more' at the top of the page and then 'delete poll'.
Without a Doodle account:
When you created the poll, Doodle sent you an email containing the admin link to your poll. The link can be used to modify or delete the poll. Click on 'more' at the top of the page and then 'delete poll'.

You can also just ignore a poll you no longer need, Doodle deletes outdated polls from time to time. Please refer to our Policy for additional information.
It is not possible to delete a poll that you did not create.