List of earthquakes in 1991
| Strongest magnitude | 7.6 Mw Costa Rica 7.6 Mw Russia |
|---|---|
| Deadliest | 6.8 Mw India 2,000 deaths |
| Total fatalities | 3,498 |
| Number by magnitude | |
| 9.0+ | 0 |
| 4.0–4.9 | 4,304 |
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This is a list of earthquakes in 1991. Only earthquakes of magnitude 6 or above are included, unless they result in damage or casualties, or are notable for some other reason. All dates are listed according to UTC time.