Bike Index is a free, nonprofit bicycle registration service based in Chicago, Illinois, created to help track and recover stolen bicycles in different cities or even countries. The index hopes to improve on other bicycle registries by being free, not limited to a geographical area, and having a searchable database available online for anyone trying to find and get back a stolen bicycle.
As of mid-2025, the index claims to have 1,429,000 cataloged bikes, 1,780 community partners, registered 158,775 stolen bikes, and recovered 15,996 stolen bicycles. .