Blok may refer to:
- Alexander Blok (1880—1921), Russian lyrical poet
- Anton Blok, Dutch anthropologist
- Petrus Johannes Blok, Dutch historian
- Stef Blok, Dutch politician
- Blok (comics), the fictional superhero of the DC Comics universe
- Blok (music), Southern California hip hop band
- Blok (clothing, New Zealand), hand printed clothing company
- Blok (Think Tank, USA), idea incubator venture
- 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