A map illustrates the major karst regions in the world.
Areas shaded in peach represent major karst regions worldwide. In North America, significant karst areas are found in northern and central Canada and the eastern and southwestern United States. In Central America, karst landscapes are prevalent, with notable areas in eastern Brazil. Europe features many karst regions, extending across North Africa from Algeria to Egypt and reaching south to Nigeria in the west and South Sudan in the east. Southern Africa also has prominent karst areas. In Southwest Asia, karst regions are widespread, as well as in Siberia and south-central China. New Guinea and eastern and southern Australia are also marked by significant karst landscapes.
Major Karst Regions | Value | 240–259 | 220–239 | 200–219 | 180–199 | 160–179 | 140–159 | 120–139 | 100–119 | 80–99 | Less than 80 | Alabama, United States of America | Alaska, United States of America | Alberta, Canada | Arizona, United States of America | Arkansas, United States of America | British Columbia, Canada | California, United States of America | Colorado, United States of America | Connecticut, United States of America | Delaware, United States of America | District of Columbia, United States of America | Florida, United States of America | Georgia, United States of America | Hawaii, United States of America | Idaho, United States of America | Illinois, United States of America | Indiana, United States of America | Iowa, United States of America | Kansas, United States of America | Kentucky, United States of America | Kiribati, Kiribati | Louisiana, United States of America | Maine, United States of America | Manitoba, Canada | Marquesas Islands, French Polynesia | Maryland, United States of America | Massachusetts, United States of America | Michigan, United States of America | Minnesota, United States of America | Mississippi, United States of America | Missouri, United States of America | Montana, United States of America | Nebraska, United States of America | Nevada, United States of America | New Brunswick, Canada | New Hampshire, United States of America | New Jersey, United States of America | New Mexico, United States of America | New York, United States of America | Newfoundland and Labrador, Canada | North Carolina, United States of America | North Dakota, United States of America | Northwest Territories, Canada | Nova Scotia, Canada | Nunavut, Canada | Ohio, United States of America | Oklahoma, United States of America | Ontario, Canada | Oregon, United States of America | Pennsylvania, United States of America | Prince Edward Island, Canada | Québec, Canada | Rhode Island, United States of America | Saskatchewan, Canada | South Carolina, United States of America | South Dakota, United States of America | Tennessee, United States of America | Texas, United States of America | Utah, United States of America | Vermont, United States of America | Virginia, United States of America | Washington, United States of America | West Virginia, United States of America | Wisconsin, United States of America | Wyoming, United States of America | Yukon, Canada | |
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| 6.25% | 13.3% | 34.1% | 49.4% | 36.1% | 40.7% | 37.0% | 24.4% | 42.3% | 44.7% | 2.23% | 46.6% | 67.2% | 99.9% | 99.9% | 53.2% | 96.8% | 99.7% | 99.5% | 82.5% | 16.8% | 91.4% | 98.2% | 40.5% | 90.3% | 54.1% | 30.9% | 48.2% | 45.8% | 43.9% | 15.5% | 2.03% | 48.2% | 45.7% | 99.9% | 4.13% | 26.2% | 57.0% | 99.9% | 60.6% | 32.3% | 54.4% | 64.7% | 27.8% | 99.9% | 46.7% | 34.6% | 98.5% | 99.9% | 83.0% | 20.5% | 53.0% | 32.6% | 75.1% | 97.2% | 97.9% | 39.9% | 99.9% | 83.0% | 57.6% | 82.6% | 93.5% | 72.9% | 10.9% | 100% | 34.6% | 31.2% | 45.6% | 78.1% | 100% | 50.4% | 32.4% | 99.2% | 21.0% | 99.8% | 99.6% | 99.9% | ||