| Millennium: | 1st millennium |
| Centuries: | 9th century – 10th century – 11th century |
| Decades: | 910s 920s 930s – 940s – 950s 960s 970s |
| Years: | 940 941 942 943 944 945 946 947 948 949 |
| Categories: | Births – Deaths – Architecture Establishments – Disestablishments |
The 940s was a decade that started on 1 January 940 and ended on 31 December 949. It is distinct from the decade known as the 95th decade which began on January 1, 941. and ended on December 31, 950.