DA
DA, da, or dA may refer to:
- Da (play), a Tony-winning play by Hugh Leonard
- Da (film), a movie adaptation of the play by Hugh Leonard
- Adi Da, a spiritual leader once known as Da Free John, and Da Love-Ananda
- Da!, a Russian youth movement
- Da (political party), a defunct Israeli political party
- Da County, county in Sichuan, China
- Da River in Vietnam
- Dalton (unit), the atomic mass unit (symbol Da)
- Danish language (ISO 639-1 alpha-2 code da)
- Deca- (symbol da), an SI prefix for a factor of 10
- DeviantArt, an English speaking, American based website that focuses on art, which is commonly abbreviated to 'dA'
- SJ Da, a Swedish locomotive
- Da., Occitan abbreviation for Dòna (Mrs.)
DA or D.A. is an acronym or abbreviation for:
- DA postal area
- Dark Ages (computer game)
- Darmstadt, a town in middle Germany
- Debtors Anonymous
- Deerfield Academy, a preparatory boarding school located in Deerfield, Massachusetts
- Degtyarev Aviation-mounted, a Soviet machine gun
- Democratic Alliance (South Africa), a South African political party.
- Denmark, a country in northern Europe (FIPS country code DA, obsolete NATO country code DA)
- Department of Agriculture, an executive department in the Philippines
- Desktop Authority, a software manufacturer of network administration products for Microsoft Windows-based networks, also known as ScriptLogic
- Deutsche Alternative (German Alternative), a rightist group
- DeviantArt, an online artistic community
- Diploma in Anaesthetics, an obsolete postgraduate qualification in anaesthetic practice
- Dielectric absorption, a factor of permittivity for capacitors
- Directory assistance, a phone service used to find out the contact information of a residence, business, or government entity
- District attorney (D.A.), a United States Attorney or County attorney
- Dragon Age, a video game series created by Bioware
- Doctor of Arts degree
- Domoic acid, a neurotoxin produced by phytoplankton
- Domus Academy, a design school in Milan, Italy
- Dopamine neurotransmitter
- Double action (disambiguation), various meanings
- Dominion Atlantic Railway
- Duck's Ass or Duck's Arse, a hairstyle
- Dumbledore's Army, a group in the Harry Potter series
- United States Department of the Army