All Longest underwater caves in USA
Ranked by reported survey data.
| # | Cave | Location | Length | Source |
|---|---|---|---|---|
| 1 | Wakulla Cave System | Leon/Wakulla, Florida, USA | 72,171 m | Cave-Exploring World Long Caves Secondary source Provided by: Casey McKinlay e-mail |
| 2 | Cathedral-Falmouth System | Suwannee, Florida, USA | 18,893.7 m | Cave-Exploring World Long Caves Secondary source Provided by: Andrew Pitkin e-mail |
| 3 | Beacon Woods - Waynes World System Also: Beacon Woods - Stratamax, Beacon Woods - Wayne's World, Beacon Woods Cave System, School Sink | Pasco, Florida, USA | 18,288.6 m | Cave-Exploring World Long Caves Tertiary / aggregate source Provided by: Die langsten Unterwasserhohlensysteme der welt, Oliver Knab |
| 4 | Luraville / Telford System | Suwanee, Florida, USA | 15,991.6 m | Cave-Exploring World Long Caves Secondary source Provided by: Andy Higgie e-mail |
| 5 | Jackson Blue Also: Jackson Blue Spring Cave System, Jackson Blue Springs | Jackson, Florida, USA | 15,436 m | Cave-Exploring World Long Caves Secondary source Provided by: Ben Martinez e-mail |
| 6 | Madison Blue Spring | Lee, Florida, USA | 12,874.8 m | KUR: Madison Secondary source Provided by: Karst Underwater Research |
| 7 | Old Bellamy Also: Derekson, Santa Fe River Rise | Alachua, Florida, USA | 12,657.5 m | Cave-Exploring World Long Caves Tertiary / aggregate source Provided by: Die langsten Unterwasserhohlensysteme der welt, Oliver Knab |
| 8 | Lineater Also: Stevenson Spring | Hamilton, Florida, USA | 11,851 m | Cave-Exploring World Long Caves Secondary source Provided by: Andy Pitkin FB |
| 9 | Peacock Cave I-II System | Suwanee, Florida, USA | 11,587.3 m | Cave-Exploring World Long Caves Secondary source Provided by: Richard Blackburn e-mail |
| 10 | Weeki Wachee Spring | Hernando, Florida, USA | 10,930 m | Cave-Exploring World Long Caves Secondary source Provided by: Andrew Pitkin e-mail |
| 11 | M2 Blue | Florida, USA | 10,822 m | Cave-Exploring World Long Caves Secondary source Provided by: Andy Pitkin FB |
| 12 | Falmouth-Cathedral Cave System Also: Cathedral-Falmouth system | Suwannee County, Florida, USA | 10,226.6 m | KUR: Falmouth Cave System Secondary source Provided by: Karst Underwater Research |
| 13 | Manatee Spring Cave System Also: Manatee Spring | Chiefland, Florida, USA | 8,046.7 m | KUR: Manatee Spring Secondary source Provided by: Karst Underwater Research |
| 14 | Hart Springs Cave System Also: Hart Spring - Black Lagoon system | Bell, Florida, USA | 6,705.6 m | Hart Springs: Activities Secondary source Provided by: Hart Springs |