Glace Bay (Scottish Gaelic: Glasbaidh) is a community in the eastern part of the Cape Breton Regional Municipality in Nova Scotia, Canada. It forms part of the general area referred to as Industrial Cape Breton.

Formerly an incorporated town (19011995), the municipal government in Glace Bay was dissolved and the community was amalgamated into the larger regional municipality. Prior to amalgamation, Glace Bay had been the province's fourth largest urban area and the largest town in Nova Scotia by population.

Neighbouring communities include Reserve Mines, Dominion, and Tower Road.

Guglielmo Giovanni Maria Marconi, 1st Marquis of Marconi (Italian: [ɡuʎˈʎɛlmo marˈkoːni]; 25 April 1874 – 20 July 1937) was an Italian inventor and electrical engineer, known for his creation of a practical radio wave-based wireless telegraph system. This led to Marconi being credited as the inventor of radio, and he shared the 1909 Nobel Prize in Physics with Karl Ferdinand Braun "in recognition of their contributions to the development of wireless telegraphy".Marconi was also an entrepreneur, businessman, and founder of The Wireless Telegraph & Signal Company in the United Kingdom in 1897 (which became the Marconi Company). In 1929, Marconi was ennobled as a Marchese (marquis) by King Victor Emmanuel III of Italy, and, in 1931, he set up Vatican Radio for Pope Pius XI.