Blat or BLAT may refer to:
- BLAT (bioinformatics), an algorithm
- Blat (favors), a form of corruption in Russia and the Soviet Union
- Blat (Romania), a term denoting a fixed match in Romanian football
- Blat (software) is a Windows command line utility that sends email using SMTP or posts to Usenet using NNTP.
- Blat, Byblos District, a village in Mount Lebanon Governorate, Lebanon
- Blat, Marjayoun a village in Marjeyoun District, Lebanon
- Caio Blat (born 1980), Brazilian actor