What is the title of an official responsible for keeping records?

The title of the official responsible for keeping records is "Registrar." Registrars typically oversee the maintenance of important records, often including vital records such as births, deaths, and marriages, as well as academic records in educational institutions. Their role encompasses ensuring that these records are accurate, updated, and accessible as needed, which is critical for various administrative, legal, and public purposes.

In the context of local governments or institutions, a registrar may also manage the registration process for voters or students, linking their functions directly to maintaining organized and easily retrievable records. This focus on record-keeping is central to the responsibilities of a registrar, making it the most suitable answer for this question.