| Millennium: | 1st millennium |
| Centuries: | 9th century – 10th century – 11th century |
| Decades: | 870s 880s 890s – 900s – 910s 920s 930s |
| Years: | 900 901 902 903 904 905 906 907 908 909 |
| Categories: | Births – Deaths – Architecture Establishments – Disestablishments |
The 900s decade ran from January 1, 900, to December 31, 909. It is the first decade of the 10th century of the Common Era.