The remain vote among Brits in Austria was the highest of all countries polled, with Germany, France and Portugal following at around 77%.
The survey polled 1,800 expats to find out whether they could vote in the referendum this Thursday and whether they are for or against Britain leaving the EU.
Around 42% of British people surveyed in Austria said they were not planning on voting, although 80% of those said that was because they were not eligible to do so.
British emigrants who have lived outside the UK for more than 15 years are not allowed to vote in this referendum.
In other Brexit news, the party leader spear-heading the Leave campaign in the UK warned over the weekend that if Britain votes to leave the European Union, Austria will follow suit within months.
A survey carried out in 2014, 20 years after Austria held its own EU referendum and voted to enter the Union, found that support for the EU was still high at around 67%.