The white vinyl single, Feel It In Your Guts, will be handed out to fans who donate to the Democrat's campaign.
The track will also be available as a free digital download.
Feel It In Your Guts is described as "a 12-string acoustic piece laced with excerpts from Bernie Sanders' speeches," and touches on topics like "the worship of money, economic inequality, social justice, and the need for basic human rights for all people".
Sanders has become a popular choice for musicians during his presidential campaign, with performances at his rallies from the likes of Vampire Weekend and Grizzly Bear.
He has also been introduced at campaign stops by Run The Jewels star Killer Mike. The politician returned the favour when he shot a video introducing the rap act at the Coachella festival in California in April (16).
In the footage, Bernie said, "One of the highlights of running for President over this past year has been getting to know Killer Mike. His depth of passion, his knowledge and commitment to community is an inspiration to me, and I value his friendship immensely."