DBA may refer to:

In academic contexts:

• Doctor of Business Administration, a research-based doctorate degree

In business:

• Dallas Bar Association, professional organization for lawyers in Dallas, Texas, U.S.
• DBA (airline), a former low-cost German airline
• Defense Base Act, type of insurance that covers employees at U.S. defense bases overseas
• Doing business as, legal term related to the name a business uses

In music:

• Dead by April, a metalcore band from Sweden
• Death By Audio, a Venue, Effect Pedal Company and Record Label in Brooklyn, NY

In science:

• Diamond-Blackfan anemia, congenital medical condition
• Dibenzylideneacetone, organic compound used as a sunscreen
• Dilute, Brown and non-Agouti, strain of laboratory mice developed by C. C. Little
• Dolichos biflorus agglutinin, cell surface lectin

In technology:

• dBA, decibel A-weighting, an environmental noise measurement
• DarkBASIC, a computer language and associated programming environment designed to simplify the creation of 3-D video games. Saves in .dba format.
• Database administrator, a person responsible for the environmental aspects of a database
• Database administration, a technical function concerned with the effective use and control of a particular database and of its related applications
• Design basis accident, scenario in nuclear facilities
• Dynamic bandwidth allocation, telecommunications algorithm

In other uses:

• Bolkhovitinov DB-A, 1930s Soviet heavy bomber
• De Bellis Antiquitatis, tabletop wargame