Registers Iceland maintains registries of properties and the population, determines fire insurance value and property valuation and undertakes investigations of the real estate market. 

The institution issues passports, ID cards, IceKey and various certificates.

Registers Iceland emphasizes electronic governing and operates the call center for the information and service provider Ísland.is.

Registers Iceland also operates working and information systems for district commissioners and municipalities.

Registers Iceland is governed by the Ministry of Transport and Local Government.