Meca or MECA may refer to:

Biology
mecA (gene), responsible for methicillin resistance in MRSA
Meca (moth), a snout moth genus in the subfamily Pyralinae

Places
Meca (Alenquer), Portugal, a parish
Los Caños de Meca, a seaside village in Spain
Maine College of Art
Middle East Center for the Arts, at Mana Contemporary in Jersey City, New Jersey

Other
Maritime E-Commerce Association
Marriage Equality California
Meca (footballer) (born 1978), Spanish footballer
Meca Tanaka, Japanese shojo manga artist,
Middle East Children's Alliance

See also
Mecca, a city in present-day Saudi Arabia
Mecca (disambiguation)
Mecha (disambiguation)
Meca astralis, a species of moth