주민등록 is a system in South Korea that registers residents' personal information, including their name, date of birth, and address. This registration is essential for various administrative purposes, such as voting, obtaining identification cards, and accessing public services. Every South Korean citizen is required to register their information with the local government office. The 주민등록증, or resident registration card, serves as an official identification document. Maintaining accurate 주민등록 records is crucial for effective governance and ensuring that residents receive the services they need.