Polyenso is an American experimental rock band based in St. Petersburg, Florida, United States.

The band is composed of lead vocalist and keyboardist Brennan Taulbee, multi-instrumentalist and vocalist Alexander Schultz, and percussionist Denny Agosto. The band's members were all at one point in American post-hardcore band Oceana, but moved to lighter, more uplifting music under the name Polyenso in 2012. Their sound is a blend of indie rock, electronic, folk, jazz, and hip-hop.

They released their debut album, One Big Particular Loop, on January 22, 2013. On October 16, 2015, the band released EP1 featuring four tracks from their upcoming second album, Pure in the Plastic. The album, released on April 1, 2016, featured a more pop-inspired sound, without the trumpet playing of their debut album.

Later that year, Alternative Press named the band one of the Top 16 Bands to Watch.