POA may refer to:
- Position of attention, a military term; see At attention
- Public Order Act 1936 (C.6), UK law concerning public disorder and violence
- Public Order Act 1963 (C.52), an amendment to the earlier 1936 Act
- Public Order Act 1986 (C.64), UK law concerning public disorder andviolence
- Puppeteers of America, US puppeteers organisation
- Power of attorney, legal authorization to act on someone else's behalf
- Portable Object Adapter, part of the CORBA specification
- Porto Alegre, Brazil, by IATA airport code for Salgado Filho International Airport located there
- Pacific Ocean Areas, area of the Pacific theater of operations assigned to Admiral Chester Nimitz during World War II
- Pakistan Olympic Association, the National Olympic Committee of Pakistan
- Pony of the Americas, horse breed
- Prison Officers' Association
- Phylogenetic Oligonucleotide Array, an oligonucleotide microarray
- Preoptic area, a brain region
- Phowa, a Tibetan Buddhist meditation technique
- Poa, Bazèga, Burkina Faso
- Poa, Boulkiemdé, Burkina Faso
- Poa, a genus in Poaceae (the grass family)
- MTR Station code for Po Lam Station
- Present on Admission, a condition Present On Admission to a hospital and which increased compensation from Medicare (United States) for DRG claims, as opposed to a Hospital Acquired Condition
- Price on application, seen on price lists to indicate that price will be given upon request
- Program of Activities (PoA), is a modality of the UNFCCC Clean Development Mechanism
- POA - Period of Availability in the context of tachograph regulations for HGV drivers and working hours for mobile workers in general
- POA - Purchase Order Acknowledgement
- POA - Purchase Order Authorization
- PoA - Harry Potter and the Prisoner of Azkaban (Book/Film)
- POA - Plan of attack