| Number | 1991 |
|---|---|
| in Words | one thousand nine hundred and ninety-one |
| Ordinal | one thousand nine hundred and ninety-first |
| Previous Year | 1990 – one thousand nine hundred and ninety |
| Next Year | 1992 – one thousand nine hundred and ninety-two |
| Century | 20 |
| Decade | 1990s |
| Roman Numeral | MCMXCI |
1991 in Words
one thousand nine hundred and ninety-one