List of the largest counties in the United States by area - wikipedia List of the largest counties in the United States by area This is a list of the 100 largest counties in the United States by area. The list is based upon the total area of a county, both land and water surface, reported by the United States Census Bureau during the 2000 Census. Alaska is not divided into counties. A different ranking becomes apparent when comparing county areas by land area alone as opposed to total area. Some counties, such as Keweenaw and Alger Counties in Michigan, include significant amounts of water in their total area and would not appear on a list that considered land area alone. This list also includes the four counties that would be included when water area is not included. Contents 1 List of largest counties 1.1 Notes 2 Alaskan boroughs and census areas 3 References List of largest counties Rank County State County Seat Total Area Land Area San Bernardino County California San Bernardino 20,105.32 sq mi ( 52,072.5 km ) 20,052.5 sq mi ( 51,936 km ) Coconino County Arizona Flagstaff 18,661.21 sq mi ( 48,332.3 km ) 18,617.42 sq mi ( 48,218.9 km ) Nye County Nevada Tonopah 18,158.73 sq mi ( 47,030.9 km ) 18,146.66 sq mi ( 46,999.6 km ) Elko County Nevada Elko 17,202.94 sq mi ( 44,555.4 km ) 17,179.03 sq mi ( 44,493.5 km ) 5 Mohave County Arizona Kingman 13,469.71 sq mi ( 34,886.4 km ) 13,311.64 sq mi ( 34,477.0 km ) 6 Apache County Arizona St. Johns 11,218.42 sq mi ( 29,055.6 km ) 11,204.88 sq mi ( 29,020.5 km ) 7 Lincoln County Nevada Pioche 10,636.77 sq mi ( 27,549.1 km ) 10,633.61 sq mi ( 27,540.9 km ) 8 Sweetwater County Wyoming Green River 10,491.17 sq mi ( 27,172.0 km ) 10,425.3 sq mi ( 27,001 km ) 9 Inyo County California Independence 10,226.98 sq mi ( 26,487.8 km ) 10,203.1 sq mi ( 26,426 km ) 10 Harney County Oregon Burns 10,226.49 sq mi ( 26,486.5 km ) 10,134.33 sq mi ( 26,247.8 km ) 11 Navajo County Arizona Holbrook 9,959.49 sq mi ( 25,795.0 km ) 9,953.18 sq mi ( 25,778.6 km ) 12 Malheur County Oregon Vale 9,929.99 sq mi ( 25,718.6 km ) 9,887.09 sq mi ( 25,607.4 km ) 13 Humboldt County Nevada Winnemucca 9,657.87 sq mi ( 25,013.8 km ) 9,647.91 sq mi ( 24,988.0 km ) 14 Fremont County Wyoming Lander 9,265.8 sq mi ( 23,998 km ) 9,182.27 sq mi ( 23,782.0 km ) 15 Maricopa County Arizona Phoenix 9,224.27 sq mi ( 23,890.7 km ) 9,203.14 sq mi ( 23,836.0 km ) 16 Pima County Arizona Tucson 9,188.83 sq mi ( 23,799.0 km ) 9,186.27 sq mi ( 23,792.3 km ) 17 White Pine County Nevada Ely 8,896.6 sq mi ( 23,042 km ) 8,875.98 sq mi ( 22,988.7 km ) 18 Idaho County Idaho Grangeville 8,502.48 sq mi ( 22,021.3 km ) 8,484.88 sq mi ( 21,975.7 km ) 19 Lake County Oregon Lakeview 8,358.47 sq mi ( 21,648.3 km ) 8,135.75 sq mi ( 21,071.5 km ) 20 Kern County California Bakersfield 8,161.42 sq mi ( 21,138.0 km ) 8,140.96 sq mi ( 21,085.0 km ) 21 Yavapai County Arizona Prescott 8,127.78 sq mi ( 21,050.9 km ) 8,123.3 sq mi ( 21,039 km ) 22 Clark County Nevada Las Vegas 8,090.66 sq mi ( 20,954.7 km ) 7,910.34 sq mi ( 20,487.7 km ) 23 Carbon County Wyoming Rawlins 7,964.03 sq mi ( 20,626.7 km ) 7,896.14 sq mi ( 20,450.9 km ) 24 San Juan County Utah Monticello 7,933.09 sq mi ( 20,546.6 km ) 7,820.18 sq mi ( 20,254.2 km ) 25 Owyhee County Idaho Murphy 7,696.71 sq mi ( 19,934.4 km ) 7,677.98 sq mi ( 19,885.9 km ) 26 Riverside County California Riverside 7,303.13 sq mi ( 18,915.0 km ) 7,207.37 sq mi ( 18,667.0 km ) 27 Tooele County Utah Tooele 7,287.12 sq mi ( 18,873.6 km ) 6,930.35 sq mi ( 17,949.5 km ) 28 Park County Wyoming Cody 6,968.51 sq mi ( 18,048.4 km ) 6,942.39 sq mi ( 17,980.7 km ) 29 Catron County New Mexico Reserve 6,929.03 sq mi ( 17,946.1 km ) 6,927.81 sq mi ( 17,942.9 km ) 30 St. Louis County Minnesota Duluth 6,859.91 sq mi ( 17,767.1 km ) 6,225.16 sq mi ( 16,123.1 km ) 31 Aroostook County Maine Houlton 6,828.79 sq mi ( 17,686.5 km ) 6,671.54 sq mi ( 17,279.2 km ) 32 Millard County Utah Fillmore 6,828.01 sq mi ( 17,684.5 km ) 6,589.13 sq mi ( 17,065.8 km ) 33 Box Elder County Utah Brigham City 6,729.03 sq mi ( 17,428.1 km ) 5,723.34 sq mi ( 14,823.4 km ) 34 Socorro County New Mexico Socorro 6,648.71 sq mi ( 17,220.1 km ) 6,646.4 sq mi ( 17,214 km ) 35 Otero County New Mexico Alamogordo 6,627.43 sq mi ( 17,165.0 km ) 6,626.5 sq mi ( 17,163 km ) 36 Washoe County Nevada Reno 6,551.32 sq mi ( 16,967.8 km ) 6,342.27 sq mi ( 16,426.4 km ) 37 Siskiyou County California Yreka 6,347.46 sq mi ( 16,439.8 km ) 6,286.78 sq mi ( 16,282.7 km ) 38 Cochise County Arizona Bisbee 6,218.77 sq mi ( 16,106.5 km ) 6,169.45 sq mi ( 15,978.8 km ) 39 Brewster County Texas Alpine 6,192.78 sq mi ( 16,039.2 km ) 6,192.61 sq mi ( 16,038.8 km ) 40 Klamath County Oregon Klamath Falls 6,135.75 sq mi ( 15,891.5 km ) 5,944.19 sq mi ( 15,395.4 km ) 41 Chaves County New Mexico Roswell 6,075.07 sq mi ( 15,734.4 km ) 6,070.86 sq mi ( 15,723.5 km ) 42 Pershing County Nevada Lovelock 6,067.55 sq mi ( 15,714.9 km ) 6,036.56 sq mi ( 15,634.6 km ) 43 Fresno County California Fresno 6,017.42 sq mi ( 15,585.0 km ) 5,962.73 sq mi ( 15,443.4 km ) 44 Cherry County Nebraska Valentine 6,009.54 sq mi ( 15,564.6 km ) 5,960.52 sq mi ( 15,437.7 km ) 45 Keweenaw County Michigan Eagle River 5,965.96 sq mi ( 15,451.8 km ) 540.97 sq mi ( 1,401.1 km ) 46 Rio Arriba County New Mexico Tierra Amarilla 5,896.1 sq mi ( 15,271 km ) 5,857.63 sq mi ( 15,171.2 km ) 47 Beaverhead County Montana Dillon 5,572.04 sq mi ( 14,431.5 km ) 5,542.31 sq mi ( 14,354.5 km ) 48 San Juan County New Mexico Aztec 5,538.36 sq mi ( 14,344.3 km ) 5,514.02 sq mi ( 14,281.2 km ) 49 Lander County Nevada Battle Mountain 5,519.47 sq mi ( 14,295.4 km ) 5,493.63 sq mi ( 14,228.4 km ) 50 Yuma County Arizona Yuma 5,518.96 sq mi ( 14,294.0 km ) 5,514.09 sq mi ( 14,281.4 km ) 51 McKinley County New Mexico Gallup 5,455.22 sq mi ( 14,129.0 km ) 5,448.72 sq mi ( 14,112.1 km ) 52 Natrona County Wyoming Casper 5,375.72 sq mi ( 13,923.1 km ) 5,339.88 sq mi ( 13,830.2 km ) 53 Pinal County Arizona Florence 5,374.09 sq mi ( 13,918.8 km ) 5,369.59 sq mi ( 13,907.2 km ) 54 Okanogan County Washington Okanogan 5,315.16 sq mi ( 13,766.2 km ) 5,268.07 sq mi ( 13,644.2 km ) 55 Flathead County Montana Kalispell 5,256.45 sq mi ( 13,614.1 km ) 5,098.34 sq mi ( 13,204.6 km ) 56 Phillips County Montana Malta 5,212.17 sq mi ( 13,499.5 km ) 5,139.57 sq mi ( 13,311.4 km ) 57 Garfield County Utah Panguitch 5,208.2 sq mi ( 13,489 km ) 5,174.22 sq mi ( 13,401.2 km ) 58 Douglas County Oregon Roseburg 5,133.83 sq mi ( 13,296.6 km ) 5,036.62 sq mi ( 13,044.8 km ) 59 Hawaii County Hawaii Hilo 5,086.7 sq mi ( 13,174 km ) 4,028.02 sq mi ( 10,432.5 km ) 60 Valley County Montana Glasgow 5,061.98 sq mi ( 13,110.5 km ) 4,921 sq mi ( 12,750 km ) 61 Alger County Michigan Munising 5,049.08 sq mi ( 13,077.1 km ) 917.83 sq mi ( 2,377.2 km ) 62 Rosebud County Montana Forsyth 5,026.94 sq mi ( 13,019.7 km ) 5,012.37 sq mi ( 12,982.0 km ) 63 Churchill County Nevada Fallon 5,023.38 sq mi ( 13,010.5 km ) 4,929.08 sq mi ( 12,766.3 km ) 64 Big Horn County Montana Hardin 5,014.65 sq mi ( 12,987.9 km ) 4,994.81 sq mi ( 12,936.5 km ) 65 Custer County Idaho Challis 4,936.79 sq mi ( 12,786.2 km ) 4,925.45 sq mi ( 12,756.9 km ) 66 Sublette County Wyoming Pinedale 4,935.66 sq mi ( 12,783.3 km ) 4,882.57 sq mi ( 12,645.8 km ) 67 Garfield County Montana Jordan 4,847.54 sq mi ( 12,555.1 km ) 4,668.06 sq mi ( 12,090.2 km ) 68 Tulare County California Visalia 4,839.09 sq mi ( 12,533.2 km ) 4,823.97 sq mi ( 12,494.0 km ) 69 Lincoln County New Mexico Carrizozo 4,831.25 sq mi ( 12,512.9 km ) 4,830.97 sq mi ( 12,512.2 km ) 70 Campbell County Wyoming Gillette 4,801.56 sq mi ( 12,436.0 km ) 4,796.76 sq mi ( 12,423.6 km ) 71 Gila County Arizona Globe 4,795.74 sq mi ( 12,420.9 km ) 4,767.7 sq mi ( 12,348 km ) 72 Las Animas County Colorado Trinidad 4,775.42 sq mi ( 12,368.3 km ) 4,772.63 sq mi ( 12,361.1 km ) 73 Pecos County Texas Fort Stockton 4,764.73 sq mi ( 12,340.6 km ) 4,763.66 sq mi ( 12,337.8 km ) 74 Los Angeles County California Los Angeles 4,752.32 sq mi ( 12,308.5 km ) 4,060.87 sq mi ( 10,517.6 km ) 75 Moffat County Colorado Craig 4,750.94 sq mi ( 12,304.9 km ) 4,742.25 sq mi ( 12,282.4 km ) 76 San Miguel County New Mexico Las Vegas 4,735.63 sq mi ( 12,265.2 km ) 4,717.04 sq mi ( 12,217.1 km ) 77 Lane County Oregon Eugene 4,721.79 sq mi ( 12,229.4 km ) 4,554 sq mi ( 11,790 km ) 78 Lassen County California Susanville 4,720.37 sq mi ( 12,225.7 km ) 4,557.27 sq mi ( 11,803.3 km ) 79 Graham County Arizona Safford 4,641.14 sq mi ( 12,020.5 km ) 4,629.32 sq mi ( 11,989.9 km ) 80 Hudspeth County Texas Sierra Blanca 4,571.93 sq mi ( 11,841.2 km ) 4,571 sq mi ( 11,840 km ) 81 Lemhi County Idaho Salmon 4,569.5 sq mi ( 11,835 km ) 4,564.16 sq mi ( 11,821.1 km ) 82 Cibola County New Mexico Grants 4,541.71 sq mi ( 11,763.0 km ) 4,539.21 sq mi ( 11,756.5 km ) 83 Grant County Oregon Canyon City 4,529.32 sq mi ( 11,730.9 km ) 4,528.6 sq mi ( 11,729 km ) 84 San Diego County California San Diego 4,525.52 sq mi ( 11,721.0 km ) 4,199.89 sq mi ( 10,877.7 km ) 85 La Paz County Arizona Parker 4,513.36 sq mi ( 11,689.5 km ) 4,499.95 sq mi ( 11,654.8 km ) 86 Uintah County Utah Vernal 4,498.98 sq mi ( 11,652.3 km ) 4,477.07 sq mi ( 11,595.6 km ) 87 Imperial County California El Centro 4,481.73 sq mi ( 11,607.6 km ) 4,174.73 sq mi ( 10,812.5 km ) 88 Emery County Utah Castle Dale 4,461.54 sq mi ( 11,555.3 km ) 4,451.85 sq mi ( 11,530.2 km ) 89 Lea County New Mexico Lovington 4,394.02 sq mi ( 11,380.5 km ) 4,392.96 sq mi ( 11,377.7 km ) 90 Piscataquis County Maine Dover - Foxcroft 4,377.36 sq mi ( 11,337.3 km ) 3,966.22 sq mi ( 10,272.5 km ) 91 Fergus County Montana Lewistown 4,350.36 sq mi ( 11,267.4 km ) 4,339.17 sq mi ( 11,238.4 km ) 92 Yakima County Washington Yakima 4,311.61 sq mi ( 11,167.0 km ) 4,296.23 sq mi ( 11,127.2 km ) 93 Albany County Wyoming Laramie 4,308.79 sq mi ( 11,159.7 km ) 4,272.75 sq mi ( 11,066.4 km ) 94 Converse County Wyoming Douglas 4,265.1 sq mi ( 11,047 km ) 4,254.72 sq mi ( 11,019.7 km ) 95 Blaine County Montana Chinook 4,238.92 sq mi ( 10,978.8 km ) 4,226.18 sq mi ( 10,945.8 km ) 96 Sierra County New Mexico Truth or Consequences 4,236.3 sq mi ( 10,972 km ) 4,180.23 sq mi ( 10,826.7 km ) 97 Teton County Wyoming Jackson 4,221.8 sq mi ( 10,934 km ) 4,007.76 sq mi ( 10,380.1 km ) 98 Modoc County California Alturas 4,203.37 sq mi ( 10,886.7 km ) 3,944.1 sq mi ( 10,215 km ) 99 Eddy County New Mexico Carlsbad 4,197.57 sq mi ( 10,871.7 km ) 4,182.02 sq mi ( 10,831.4 km ) 100 Eureka County Nevada Eureka 4,179.96 sq mi ( 10,826.0 km ) 4,175.68 sq mi ( 10,815.0 km ) 101 ( 94 ) Johnson County Wyoming Buffalo 4,174.71 sq mi ( 10,812.4 km ) 4,166.28 sq mi ( 10,790.6 km ) 102 ( 100 ) Kane County Utah Kanab 4,108.42 sq mi ( 10,640.8 km ) 3,991.96 sq mi ( 10,339.1 km ) 104 ( 95 ) Lincoln County Wyoming Kemmerer 4,089.01 sq mi ( 10,590.5 km ) 4,069.09 sq mi ( 10,538.9 km ) 106 ( 99 ) Weld County Colorado Greeley 4,021.56 sq mi ( 10,415.8 km ) 3,992.45 sq mi ( 10,340.4 km ) Notes ^ Jump up to : The figure shown in parentheses indicates the rank this county would have when considering land area only. Alaskan boroughs and census areas Unlike most states, Alaska is divided into boroughs and census areas that serve as county - equivalents for the Census Bureau. If included with the remainder of the counties and county - equivalent areas in the United States, Alaska 's boroughs and census areas would occupy the largest 11. Below is a list of these boroughs and census areas that would rank in the top 100 if included in the above list. The Unorganized Borough, in which all of the census areas are located, is not considered a county - equivalent area and is not included in this list. With an area of 323,440 sq mi ( 837,700 km ), it would easily top the list, outranking every state in the country ( except Alaska ). The rankings in the below list reflect the rank each borough or census area would have if included with all counties and county - equivalent areas in the United States ( up to # 11 ). Rank County State Total Area Land Area Yukon - Koyukuk Census Area Alaska 147,842.51 sq mi ( 382,910.3 km ) 145,899.69 sq mi ( 377,878.5 km ) North Slope Borough Alaska 94,762.64 sq mi ( 245,434.1 km ) 88,817.12 sq mi ( 230,035.3 km ) Bethel Census Area Alaska 45,508.46 sq mi ( 117,866.4 km ) 40,633.31 sq mi ( 105,239.8 km ) Northwest Arctic Borough Alaska 40,762 sq mi ( 105,570 km ) 35,898.34 sq mi ( 92,976.3 km ) 5 Valdez - Cordova Census Area Alaska 40,199.15 sq mi ( 104,115.3 km ) 34,319.1 sq mi ( 88,886 km ) 6 Lake and Peninsula Borough Alaska 30,906.96 sq mi ( 80,048.7 km ) 23,781.96 sq mi ( 61,595.0 km ) 7 Nome Census Area Alaska 28,283.33 sq mi ( 73,253.5 km ) 23,000.91 sq mi ( 59,572.1 km ) 8 Matanuska - Susitna Borough Alaska 25,259.79 sq mi ( 65,422.6 km ) 24,681.54 sq mi ( 63,924.9 km ) 9 Southeast Fairbanks Census Area Alaska 25,061.19 sq mi ( 64,908.2 km ) 24,814.86 sq mi ( 64,270.2 km ) 10 Kenai Peninsula Borough Alaska 24,754.6 sq mi ( 64,114 km ) 16,013.26 sq mi ( 41,474.2 km ) 11 Dillingham Census Area Alaska 20,928.41 sq mi ( 54,204.3 km ) 18,674.78 sq mi ( 48,367.5 km ) 12 Kusilvak Census Area Alaska 19,669.24 sq mi ( 50,943.1 km ) 17,193.5 sq mi ( 44,531 km ) 13 Aleutians East Borough Alaska 15,011.6 sq mi ( 38,880 km ) 6,988.14 sq mi ( 18,099.2 km ) 14 Aleutians West Census Area Alaska 14,116.51 sq mi ( 36,561.6 km ) 4,396.77 sq mi ( 11,387.6 km ) 15 Denali Borough Alaska 12,774.53 sq mi ( 33,085.9 km ) 12,749.65 sq mi ( 33,021.4 km ) 16 Prince of Wales - Outer Ketchikan Census Area Alaska 12,706.3 sq mi ( 32,909 km ) 7,410.62 sq mi ( 19,193.4 km ) 17 Kodiak Island Borough Alaska 12,023.67 sq mi ( 31,141.2 km ) 6,559.85 sq mi ( 16,989.9 km ) 18 Skagway - Hoonah - Angoon Census Area Alaska 11,376.73 sq mi ( 29,465.6 km ) 7,896.48 sq mi ( 20,451.8 km ) 19 Yakutat City and Borough Alaska 9,459.28 sq mi ( 24,499.4 km ) 7,650.46 sq mi ( 19,814.6 km ) 20 Wrangell - Petersburg Census Area Alaska 9,021.21 sq mi ( 23,364.8 km ) 5,834.94 sq mi ( 15,112.4 km ) 21 Fairbanks North Star Borough Alaska 7,444.02 sq mi ( 19,279.9 km ) 7,366.24 sq mi ( 19,078.5 km ) 22 Sitka City and Borough Alaska 4,811.53 sq mi ( 12,461.8 km ) 2,873.98 sq mi ( 7,443.6 km ) References Jump up ^ `` United States -- County by State, and for Puerto Rico ''. United States Census Bureau. Archived from the original on February 8, 2010. Retrieved 2009 - 06 - 25. United States county - related lists General Index By state Former counties Secession proposals Demographics Population African - American majority Hispanic / Latino majority Native American majority Most populous county by state Most densely populated county least Economy Highest - income Lowest - income Geography Largest area Smallest area Highest mountains Name origins Etymologies A -- D E -- I J -- M N -- R S -- Z Most common names Less common names Named after Confederate historical figures Named after rivers Named after U.S. Presidents Named after women See also County statistics of the United States Smithsonian trinomial Retrieved from `` https://en.wikipedia.org/w/index.php?title=List_of_the_largest_counties_in_the_United_States_by_area&oldid=826733990 '' Categories : Lists of counties of the United States United States - related lists of superlatives Lists by area Talk Contents About Wikipedia Català Deutsch Gaeilge 中文 Edit links This page was last edited on 20 February 2018, at 18 : 45. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: what is the largest county in the continental united states
Answer: San Bernardino County