This is the biggest music festival of all time

20 June 2025, 13:00

The biggest festival of all time:  Donauinselfest DIF 2015
The biggest festival of all time: Donauinselfest DIF 2015. Picture: Alamy

You may think Glastonbury is pretty big, but here's a festival that had an audience of millions!

Radio X

By Radio X

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What, would you say, was the biggest music festival ever held?

Glastonbury before the wall went up? One of the massive free festivals in the 1960s, maybe? Something ridiculously large in South America perhaps?

The answer is none of the above.

There has been a music festival that bought in a crowd so enormous, it actually broke a Guinness World Record.

The festival in question was Austria's Donauinselfest - the Danube Island Festival - which was held in Vienna between 26th and 28th June 2015.

According to Guinness World Records, the three day event that year attracted an unbelievable crowd of 3.3 million people!

The 32nd Danube Island Festival (Donauinselfest) in Vienna, Austria, 27th June 2015. Make sure you arrange to meet your mates at the right end of the festival site.
The 32nd Danube Island Festival (Donauinselfest) in Vienna, Austria, 27th June 2015. Make sure you arrange to meet your mates at the right end of the festival site. Picture: Alamy

The festival is held on Donauinsel, which is a 13-mile island in the centre of Vienna in Austria. The festival site itself takes up 4 miles and is broken up into several areas that play host to over 2,000 artists. There are 13 stages and 17 themed areas.

Das war das Donauinselfest 2015

While other events can boast a larger attendance, Donauinsel is the largest open air festival in one single location, as opposed to a collection of venues across a town or city.

And the most amazing thing is that Donauinsel is FREE. It's organised by Austria's Social Democratic Party, which is a bit like the LibDems putting on Glastonbury.

A aerial view of the main stage at Donauinselfest DIF 2015 on June 27, 2015 in Vienna, Austria.
A aerial view of the main stage at Donauinselfest DIF 2015 on June 27, 2015 in Vienna, Austria. Picture: Alamy

The event had notched up 3.2 million people in 2013, but went on to break the record two years later when, according to Guinness World Records, 1.1 million people attended on the Friday, 1.3 million on Saturday and 1 million on Sunday.

Imagine the queue for the toilets.

Natalie Imbruglia performs at the world's biggest open air festival, 27 June 2015. Yes, she did Torn.
Natalie Imbruglia performs at the world's biggest open air festival, 27 June 2015. Yes, she did Torn. Picture: Alamy

All the people were there to see the likes of Natalie Imbruglia, Anastacia, Taio Cruz and hundreds of DJs and other bands and artists.

One of the other main attractions is the Rock The Island contest, which sees unsigned artists compete for a slot on the prestigious main stage.

Anastacia performing at Donauinselfest, June 2015
Anastacia performing at Donauinselfest, June 2015. Picture: Alamy

Donauinselfest returns in 2025 between 20th and 22nd June.