Alca may refer to:
* Advanced Light Combat Aircraft; see
Aero L-159 Alca
* ''
Alca'', a genus of birds
* The
Free Trade Area of the Americas, known as ''Área de Libre Comercio de las Américas'' in Spanish, and ''Área de Livre Comércio das Américas'' in Portuguese
*The
Professional Landcare Network
The National Association of Landscape Professionals, formerly known as the Professional Landcare Network (PLANET), is a professional body for lawn care professionals, landscape management professionals (exterior maintenance contractors), design/ ...
, previously known as the Associated Landscape Contractors of America
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