Great Britain is a large island near the coast of Western Europe.
Great Britain may also refer to:
- Kingdom of Great Britain, a sovereign state from 1707 to 1800
- United Kingdom of Great Britain and Ireland, the United Kingdom from 1801 to 1927
- United Kingdom of Great Britain and Northern Ireland, a modern state from 1927
- SS Great Britain, a passenger steamship launched in 1843 and now preserved in Bristol, United Kingdom
- Great Britain, a GWR 3031 Class locomotive, built in 1892 and retired in 1914