Blok may refer to:
- Blok (surname)
- Blok (comics), the fictional superhero of the DC Comics universe
- Blok M, downtown shopping area in Jakarta, Indonesia
- Mega Bloks, plastic building blocks produced by Mega Bloks, Incorporated
- The Vlaams Blok (Dutch: Vlaams Blok), former Flemish right-wing nationalist political party
- Blok (Pendragon series), the all-powerful company in the book The Quillan Games by D. J. MacHale
- A blok, one of the monsters in the French animated cartoon series Code Lyoko
- The Blok, a character in the animated TV series Nexo Knights
- Blok (avant-garde group), Polish avant-garde artist collective active in the years 1924-1926