Blackguard ( /ˈblæɡərd/ "Blaggurd") is an old-fashioned term for a scoundrel.
Blackguard or Black Guard(s) may also refer to:
- Blackguard (band), a death metal band
- Black Guard (Brazil), a militia of former slaves intended to protect the monarchy
- Black Guard, a corps of Black African soldiers in Morocco
- Black Guards, armed anarchist groups formed after the Russian Revolution
- Blackguards, a 2014 video game from Daedalic Entertainment
- The Blackguard (novel), a 1923 novel by Raymond Paton
- The Blackguard, 1925 film based on the novel
- Black Band (landsknechts), also called Black Guards, mercenary army in Germany created 1514