NCCA
- Defense Counterintelligence and Security Agency
- Education in the Republic of Ireland
- Institute for Credentialing Excellence
- International Championship of Collegiate A Cappella
- NCAA (disambiguation)
- National Centre for Computer Animation
- National Centre for Contemporary Arts
- National Collegiate Cycling Association
- National Commission for Culture and the Arts
- National Council of Churches in Australia
- Neuroblastoma Children's Cancer Alliance UK
- Nigerian Civil Aviation Authority
- Northern Centre for Contemporary Art