Slak
- Cross-linguistic onomatopoeias
- Franci Slak
- Francois van Wyk
- Grzegorz Ślak
- Hanna Slak
- Lojze Slak
- Manda and the Marbles
- Perutnina Ptuj (cycling team)
- SLAC (disambiguation)
- Slack (disambiguation)
- Slak Sagar
- Slak, Alsheyevsky District, Republic of Bashkortostan
- Slak, Chishminsky District, Republic of Bashkortostan