You can find bicycle stands (German only) at almost all rapid transit and regional train stations in the fare rings ABCDE as well as the ferry terminal at Finkenwerder, many of them roofed over. For a small fee, you can also rent special bicycle lockers to stow your bike away at certain stations.
Bit by bit, the Bike+Ride system in Hamburg is growing and growing. By 2025 it is planned to have something like 12,000 bike stands and bicycle lockers available. To ask about renting a secure bicycle locker in Hamburg, just click on the link below to the service provider P+R-Betriebsgesellschaft mbH.
In Hamburg, all other bike stands fall within the responsibility of the local district councils. In the surrounding areas, please contact your municipal authorities.