nik

NIK is an acronym that can refer to several unrelated concepts depending on context. In government and civil administration, NIK most commonly denotes a national identification number, a unique numeric or alphanumeric code assigned to residents or citizens to verify identity and access public services. The specific format, issuing authority, and privacy protections of an NIK vary by country.

In Indonesia, NIK stands for Nomor Induk Kependudukan (Population Registration Number). It is a 16-digit code printed on the national identity card (KTP) and used in civil registration and government services. The NIK serves as a key reference in the national population database and is linked to records such as births, marriages, and residency. The digits encode geographic and birth information, subject to updates in policy and privacy standards.

Outside Indonesia, NIK can appear as an abbreviation in different languages for other terms and uses; examples include references to national identity numbers in various countries or to unrelated phrases in distinct contexts. Because NIK data are highly sensitive, many jurisdictions regulate its collection, storage, and use to protect personal privacy.