LOA
LOA may stand for:

Music
Life of Agony, a New York hardcore/hard rock band
Lights Out Asia, a Milwaukee, Wisconsin-based post-rock and ambient band
Lords of Acid, a Belgian-American post-industrial/techno band
"Love on Arrival," a song by country music singer Dan Seals

Other
Lake Oconee Academy, Georgia
Law of attraction, a belief of New Thought movement
Leave of absence, a period of time that one must be away from his/her primary job, while maintaining the status of employee.
Level of assurance
Length overall, the maximum length of a vessel's hull measured parallel to the waterline.
Letter of Agency (also Letter of Authorization), a document authorizing a telecommunications provider to act on a consumer's behalf
Letter of Authority, a legal document in South Africa for vehicle registration
Library of America, an American publisher
Library Oriented Architecture, a software engineering methodology
Lines of Action, an abstract-strategy game
Left occipito-anterior, a cephalic presentation in childbirth
Low-opioid anesthesia, a variant of, general anesthesia
Limits of Agreement, a statistical measure used when comparing the degree of agreement among raters

See also
Loa (disambiguation)