"Blitzkrieg Bop" is an anthem by the punk rock group the Ramones. It appeared as their very first single released in November 1975 in the U.S. and July 1976 in the U.K.. A different version (which eventually became the most popular one) appeared on their first album.

The song was mainly written by Ramones drummer Tommy Ramone, and is based on a simple three-chord pattern. "Blitzkrieg Bop" opens with the chant "Hey! Ho! Let's go!". The song is popular at sporting events, especially baseball games, where "Hey! Ho! Let's go!" is sometimes shouted as a rallying cry, usually for the home team.

"Blitzkrieg Bop" is number 92 on the Rolling Stone list of The 500 Greatest Songs of All Time. In March 2005, Q magazine placed it at number 31 in its list of the 100 Greatest Guitar Tracks.

The song has been covered by various artists including studio versions by Rob Zombie, The Beautiful South, Screeching Weasel, The Hanson Brothers, and Die Toten Hosen.

This song has been featured in numerous venues across the spectrum of popular culture, including—but not limited to—the following:

• The video game Tony Hawk's Pro Skater 3
• Television ads for the "Cingular" Go-Phone
• The movies National Lampoon's Vacation (1983), Jimmy Neutron: Boy Genius (2001) and Accepted (2006).
• In Final Destination 3, after the protagonist and some others gets off of the doomed rollercoaster, the remaining people on the ride (mostly seniors in high school) shout "Hey! Ho! Let's go!" repeatedly.
• The TV Series "Space: Above and Beyond" ("Space: 2063" Outside the US) [1995]
• In The King of Queens episode "Icky Shuffle".
• In The Bronx is Burning episode "Team in Turmoil" and several episodes after that.
• In the video games Rock Band and MLB 08: The Show.
• In the 100th Episode of Family Guy
• In The Simpsons Treehouse of Horror XVIII