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- Tornadoes since 2000: 15 (0.22 per 100 square miles)
- #2,047 nationally
- Tornadoes this year, as of May 31: 0

#4. Aroostook County

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- Tornadoes since 2000: 10 (0.48 per 100 square miles)
- #1,982 nationally
- Tornadoes this year, as of May 31: 0

#3. Oxford County

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- Tornadoes since 2000: 5 (0.50 per 100 square miles)
- #1,971 nationally
- Tornadoes this year, as of May 31: 0

#2. York County

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- Tornadoes since 2000: 8 (0.96 per 100 square miles)
- #1,800 nationally
- Tornadoes this year, as of May 31: 0

#1. Cumberland County