"Information about planning decisions, crime rates, abandoned vehicles, house prices, road accidents and many other metrics will form the London datastore.
The Greater London Authority said the online data warehouse will officially open on 29 January.
Boris Johnson, London Mayor, said releasing the data would make the GLA more open and accountable."
London is following the lead of the UK's central government, which announced last November that it too would be opening up a variety of data streams to the public. The UK data website will go live in April.