|Centuries:||8th century – 9th century – 10th century|
|Decades:||840s 850s 860s – 870s – 880s 890s 900s|
|Years:||871 872 873 – 874 – 875 876 877|
- Ingólfur Arnarson arrives as the first permanent Viking settler in Iceland. He settles in Reykjavík (probable date).
- The Danes invade Mercia.
- The territory of the Vistulans is conquered by King Svatopluk I of Great Moravia.
- November – Frost begins in Scotland and lasts until April 875.
- The rebellion of Huang Chao in China begins, weakening the strength of the already declining Tang Dynasty.