Follow these steps to add a Tumblr Poll to your Tumblr post/page:
1) Create a poll using the Create a Poll form.
2) Locate the poll you created in the Content Dashboard.
3) Click the “Add to Site” button.
4) Click on the “Landing Page” tab and copy the link.
5) From your Tumblr account dashboard, click on the posting option labeled “Link.”
6) Paste your URL in the box that appears and click “Post.” Feel free to add tags if needed!
You’re done, the poll was added to your Tumblr site!