FNA may refer to:
* Algerian National Front (French: ')
* β-FNA, beta-funaltrexamine, ''beta''-funaltrexamine, an opioid antagonist
* Farmers of North America, a Canadian agricultural company
* Fars News Agency, in Iran
* Fédération Française Aéronautique, a French aeroclub association
* "fast, neat, average", the response to which is a shibboleth of the US Air Force academy
* Ferrell North America, an American propane company
* Filipino Nurses Association, now the Philippine Nurses Association
* Fine-needle aspiration
* ''Flora of North America'', a multivolume botanical work
* Fondo Nacional de las Artes (National Endowment for the Arts), in Argentina
* Guatemalan Athletics Federation (Spanish: ')
* Lungi International Airport, in Sierra Leone
* Nicaraguan Athletics Federation (Spanish: ')
* Norlandair, an Icelandic airline
* a free, open-source reimplementation of the Microsoft XNA#Alternative_implementations, Microsoft XNA Game Studio libraries
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