"Lost in the Woods" is a song written by Kristen Anderson-Lopez and Robert Lopez for Disney's animated film Frozen II (2019), the sequel to the 2013 animated film. It was recorded by American actor and singer Jonathan Groff, who voices the character Kristoff, and produced by its songwriters with Dave Metzger and Tom MacDougall. The song was released by Walt Disney Records on November 15, 2019, as part of the film's soundtrack album. "Lost in the Woods" is a soft rock and glam rock ballad about relationship insecurities. Featuring piano keyboards and distorted electric guitars prominently throughout, the song's production and instrumentation distinguish it from the film's other musical numbers.

Kristoff is a fictional character in Walt Disney Animation Studios' Frozen franchise. He appears in the animated features Frozen (2013) and Frozen II (2019), and the animated short films Frozen Fever (2015), Olaf's Frozen Adventure (2017) and Once Upon a Snowman (2020). He was created by co-directors Chris Buck and Jennifer Lee and is voiced primarily by Jonathan Groff.