Tornadoes in Iroquois County
The Storm Prediction Center records 62 tornadoes whose paths touched Iroquois County, Illinois between 1954 and 2025. They killed 1 person and injured 34. The busiest month is June, with 14 tornadoes. The strongest was an F3 on 12 March 1976. The most recent was on 28 December 2025.
- 62tornadoes
- 1death
- 34injuries
- 555per 10,000 sq mi of land
A tornado that crossed several counties counts in each one, so county counts add up to more than the state's.
How strong were the tornadoes in Iroquois County?
| Rating | Tornadoes | Share |
|---|---|---|
| F0 / EF0 | 20 | 32% |
| F1 / EF1 | 23 | 37% |
| F2 / EF2 | 9 | 15% |
| F3 / EF3 | 4 | 6% |
| F4 / EF4 | 0 | 0% |
| F5 / EF5 | 0 | 0% |
| Unknown rating | 6 | 10% |
Iroquois County tornadoes over time
The 2020s only run to 2025, so that bar is for a shorter period. The record starts in 1950.
Show the numbers
| Period | Count |
|---|---|
| 1950s | 5 |
| 1960s | 5 |
| 1970s | 10 |
| 1980s | 4 |
| 1990s | 10 |
| 2000s | 8 |
| 2010s | 8 |
| 2020s | 12 |
Show the numbers
| Period | Count |
|---|---|
| Jan | 0 |
| Feb | 1 |
| Mar | 7 |
| Apr | 11 |
| May | 13 |
| Jun | 14 |
| Jul | 3 |
| Aug | 3 |
| Sep | 1 |
| Oct | 2 |
| Nov | 2 |
| Dec | 5 |
Records for Iroquois County
- Deadliest and Strongest: St. Anne, Illinois tornado12 March 1976, F3, 1 death, 15 injuries, 38.5 miles long
- Longest path: Illinois tornado4 March 1961, F1, 1 injury, 51.5 miles long
- Most recent: Illinois tornado28 December 2025, Unknown rating, 4.9 miles long
Notable tornadoes in Iroquois County
- St. Anne, Illinois tornado12 March 1976, F3, 1 death, 15 injuries, 38.5 miles long
Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.