DBL may refer to:
Dansk Biografisk Leksikon, a Danish biographical dictionary
Dashing Buffalo, a professional League of Legends team based in Ho Chi Minh City, Vietnam
Database Management Library, a C++ object-oriented programming library
dBase Language, the computer language implemented by dBASE Plus, dB2K, and Visual dBASE software
Design-based learning, a modern pedagogy
Devizes branch line, a defunct railway line running from Holt to Pewsey from 1857 to 1966
Digital Bibliography & Library Project's DBL-Browser
Don Bosco High & Technical School, Liluah, an all-boys, English medium school near the city of Kolkata, India
Double (disambiguation), various meanings
Double bottom line, an accounting framework that measures fiscal performance
Drawing Black Lines, the second album by American Post-Hardcore band, Project 86
Drexel Burnham Lambert, an investment bank
Dunstan Baby Language, a theory about early baby language
Dyirbal language, ISO 639-3 language code dbl
