Yes, an official for Train to Busan exists and is available across several platforms . Where to Watch the English Dub

While you can hunt down the English dub, we strongly urge you to watch Train to Busan in its original Korean with English subtitles for three reasons:

If you are determined to watch the film in English, here is exactly how to do it.

If you are watching via streaming (Netflix/Hulu), no. The audio menu will only show "Korean (Original)." If you own the UK Blu-ray, you will see "English 5.1 DTS-HD" as an option.