# List of longest caves in the United States

The following is a list of the longest caves in the United States per length (over 50 kilometres or 30 miles) of documented passageways. Many passageways are still being discovered; this list is based on the latest verifiable data. Some caves and cave systems are partially accessible to the general public. Other caves have restricted access; restrictions may include limiting access to experienced spelunkers or scientific research teams.
| # | System | Length | Location | Coordinates | Associated parks, protected areas | Access |
| 1 | Mammoth Cave | 685.6 km (426.0 mi) | near Brownsville, Kentucky | 37°11′15″N 86°06′13″W﻿ / ﻿37.18758°N 86.10357°W﻿ / 37.18758; -86.10357﻿ (Mammoth cave historic entrance) | Mammoth Cave National Park, also a World Heritage Site and International Biosphere Reserve. Longest cave in the world. | Some public access |
| 2 | Jewel Cave | 353.69 km (219.8 mi) | near Custer, South Dakota | 43°43′46″N 103°49′46″W﻿ / ﻿43.72944°N 103.82944°W﻿ / 43.72944; -103.82944﻿ (Jewel Cave) | Jewel Cave National Monument | Some public access |
| 3 | Wind Cave | 266.8 km (165.8 mi) | near Hot Springs, South Dakota | 43°33′29″N 103°28′46″W﻿ / ﻿43.55804°N 103.47955°W﻿ / 43.55804; -103.47955﻿ (Wind Cave) | Wind Cave National Park | Some public access, suspended as of May 2024 for elevator replacement |
| 4 | Lechuguilla Cave | 244.7 km (152.0 mi) | near Carlsbad, New Mexico | 32°11′26″N 104°30′12″W﻿ / ﻿32.1906420°N 104.5033091°W﻿ / 32.1906420; -104.5033091﻿ (Grotte de Lechuguilla) | Carlsbad Caverns National Park | Restricted access, requires authorization |
| 5 | Fisher Ridge Cave System | 212.1 km (131.8 mi) | near Brownsville, Kentucky | 37°11′14″N 85°58′30″W﻿ / ﻿37.1873°N 85.9751°W﻿ / 37.1873; -85.9751﻿ (Fisher Ridge System Historic Entrance) | partly within Mammoth Cave National Park | |
| 6 | Helms Deep Cave | 112.8 km (70.09 mi) | Perry County, Tennessee | | None.Entrances are on private property. | Restricted access, requires authorization |
| 7 | Great Savannah Cave System,(Maxwelton Sink Cave-McClung Cave) | 82.5 km (51.26 mi) | near Greenbrier County, West Virginia | 37°51′35″N 80°24′22″W﻿ / ﻿37.859703°N 80.406044°W﻿ / 37.859703; -80.406044 | None. Entrances are on private property. | Restricted access, requires authorization |
| 8 | Friars Hole Cave System | 81.2 km (50.46 mi) | near Renicks Valley, West Virginia | 38°04′02″N 80°19′47″W﻿ / ﻿38.067203°N 80.329775°W﻿ / 38.067203; -80.329775﻿ (Friars Hole Cave) | None. Multiple entrances, most on private property. | Some entrances closed. Some entrances require authorization. Some entrances accessible. |
| 9 | Binkley's Cave System | 72.4 km (44.99 mi) | near Corydon, Indiana | 38°10′57″N 86°09′01″W﻿ / ﻿38.1824995°N 86.1501717°W﻿ / 38.1824995; -86.1501717 | None. Entrance on private property. | Some public access |
| 10 | Fort Stanton Cave | 71.7 km (44.55 mi) | near Lincoln County, New Mexico | 33°30′24″N 105°29′37″W﻿ / ﻿33.506670°N 105.493610°W﻿ / 33.506670; -105.493610 | Fort Stanton–Snowy River Cave National Conservation Area | May require special permits. |
| 11 | Hellhole | 70.1 km (43.56 mi) | Germany Valley, West Virginia | 38°46′17″N 79°22′41″W﻿ / ﻿38.771361°N 79.378103°W﻿ / 38.771361; -79.378103 | None. Entrance is privately leased and owned. Home of two federally protected bat species. | No public access at any time. Restricted scientific access. |
| 12 | Kazumura Cave | 65.5 km (40.70 mi) | Pahoa, Hawaii | 19°31′08″N 155°01′52″W﻿ / ﻿19.518890°N 155.031110°W﻿ / 19.518890; -155.031110 | None. Entrance on private property. | Some public access for fee. |
| 13 | Double Bopper Cave | 65.3 km (40.58 mi) | Coconino County, Arizona | | Grand Canyon National Park | Restricted access, requires authorization |
| 14 | Blue Spring Cave | 64.4 km (40.02 mi) | near Sparta, Tennessee | 35°57′46″N 85°23′07″W﻿ / ﻿35.962811°N 85.385311°W﻿ / 35.962811; -85.385311 | none | Restricted access, requires authorization |
| 15 | Carlsbad Caverns | 63.5 km (39.46 mi) | near Carlsbad, New Mexico | 32°10′37″N 104°26′28″W﻿ / ﻿32.177057°N 104.441039°W﻿ / 32.177057; -104.441039 | Carlsbad Caverns National Park | Public access. |
| 16 | Organ Cave | 61.9 km (38.46 mi) | Greenbrier County, West Virginia | 37°43′05″N 80°26′11″W﻿ / ﻿37.7181564°N 80.4362982°W﻿ / 37.7181564; -80.4362982 | None. Entrances on private property. | Some entrances closed. Some entrances require authorization. Some entrances accessible. |
| 17 | Wakulla-Leon Sinks Cave System | 56.6 km (35.17 mi) | Wakulla County, Florida | 30°14′07″N 84°18′10″W﻿ / ﻿30.2354147°N 84.3028754°W﻿ / 30.2354147; -84.3028754 | None. Underwater cave system. | |
| 18 | Whigpistle System | 55.7 km (34.61 mi) | Edmonson County, Kentucky | 37°07′11″N 86°08′10″W﻿ / ﻿37.1196°N 86.1362°W﻿ / 37.1196; -86.1362﻿ (Whigpistle System Whigpistle Entrance) | none | |
| 19 | Crevice Cave | 50.2 km (31.19 mi) | Perry County, Missouri | 37°45′10″N 89°52′30″W﻿ / ﻿37.7527°N 89.8749°W﻿ / 37.7527; -89.8749﻿ (Crevice cave) | none | |
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