Bay Street is a Lower City arterial road in Hamilton, Ontario, Canada. It starts at Inglewood Drive, just South of Aberdeen Avenue, as a collector road with only two lanes, then eventually becomes a six lane thoroughfare at its peak. Bay Street also passes through Downtown Hamilton, where many high-rise buildings are found. Bay Street is a one-way street from Aberdeen Avenue to Cannon Street West. Bay Street continues as an arterial route to Strachan Street, where it is downgraded to a neighbourhood collector and eventually ends at a curb at Pier 4 Park at Burlington Street in the city's North End.
Bay Street, derives its name from its proximity to Hamilton Harbour, which was once Burlington Bay. In 1919, a federal Order-In-Council changed the name of Burlington Bay to Hamilton Harbour.