RiskMeter’s Top 10 Sinkhole-Prone Counties in Florida are:
1 Pasco
2 Hernando
3 Hillsborough
4 Marion
5 Pinellas
6 Citrus
7 Polk
8 Orange
9 Seminole
10 Lake
Data from this 2011 article in Insurance Journal ->
Florida’s Top 10 Sinkhole-Prone Counties