A surprising number of U.S. counties have 100% rural land-702, in fact. Stacker compiled a list of the most rural counties in California using data from the U.S. Census Bureau. Counties are ranked by the percent of land area that is rural, as of the 2010 Census, with ties broken by residents per square mile, according to 2020 5-year population estimates.
According to the Census Bureau, rural land encompasses any land that isn't an urban area. To be considered an urban area, a place has to have a densely settled core of census tracts or blocks and count at least 2,500 people, at least 1,500 of whom must be residents of non-institutional buildings. Areas with 50,000 people or more are considered urbanized areas, while areas with between 2,500 and 50,000 people are considered urban clusters.
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- Rural area: 0.4% (0 square miles)
- Urban area: 99.6% (47 square miles)
- Total land area: 47 square miles
--- #58 largest county in state, #3,105 nationwide
- Population density: 18,662.9 people / square mile (874,784 residents)
--- #58 lowest density county in state, #3,139 nationwide
- Rural area: 33.7% (267 square miles)
- Urban area: 66.3% (524 square miles)
- Total land area: 791 square miles
--- #47 largest county in state, #1,089 nationwide
- Population density: 4,010.2 people / square mile (3.2 million residents)
--- #57 lowest density county in state, #3,117 nationwide
- Rural area: 57.3% (410 square miles)
- Urban area: 42.7% (306 square miles)
- Total land area: 716 square miles
--- #51 largest county in state, #1,265 nationwide
- Population density: 1,603.2 people / square mile (1.1 million residents)
--- #53 lowest density county in state, #3,053 nationwide
- Rural area: 63.3% (468 square miles)
- Urban area: 36.7% (271 square miles)
- Total land area: 739 square miles
--- #49 largest county in state, #1,195 nationwide
- Population density: 2,248.4 people / square mile (1.7 million residents)
--- #55 lowest density county in state, #3,086 nationwide
- Rural area: 64.9% (2,635 square miles)
- Urban area: 35.1% (1,423 square miles)
- Total land area: 4,058 square miles
--- #11 largest county in state, #117 nationwide
- Population density: 2,474.4 people / square mile (10.0 million residents)
--- #56 lowest density county in state, #3,095 nationwide
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- Rural area: 65.9% (635 square miles)
- Urban area: 34.1% (329 square miles)
- Total land area: 965 square miles
--- #43 largest county in state, #727 nationwide
- Population density: 1,594.3 people / square mile (1.5 million residents)
--- #52 lowest density county in state, #3,050 nationwide
- Rural area: 68.6% (308 square miles)
- Urban area: 31.4% (141 square miles)
- Total land area: 448 square miles
--- #56 largest county in state, #2,279 nationwide
- Population density: 1,707.4 people / square mile (765,623 residents)
--- #54 lowest density county in state, #3,061 nationwide
- Rural area: 74.4% (959 square miles)
- Urban area: 25.6% (331 square miles)
- Total land area: 1,290 square miles
--- #37 largest county in state, #464 nationwide
- Population density: 1,491.7 people / square mile (1.9 million residents)
--- #51 lowest density county in state, #3,043 nationwide
- Rural area: 81.9% (3,446 square miles)
- Urban area: 18.1% (760 square miles)
- Total land area: 4,207 square miles
--- #9 largest county in state, #110 nationwide
- Population density: 790.2 people / square mile (3.3 million residents)
--- #50 lowest density county in state, #2,963 nationwide
- Rural area: 82.2% (366 square miles)
- Urban area: 17.8% (79 square miles)
- Total land area: 445 square miles
--- #57 largest county in state, #2,287 nationwide
- Population density: 613.6 people / square mile (273,170 residents)
--- #49 lowest density county in state, #2,926 nationwide
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- Rural area: 84.5% (439 square miles)
- Urban area: 15.5% (81 square miles)
- Total land area: 520 square miles
--- #55 largest county in state, #2,003 nationwide
- Population density: 498.6 people / square mile (259,441 residents)
--- #46 lowest density county in state, #2,877 nationwide
- Rural area: 86.2% (708 square miles)
- Urban area: 13.9% (114 square miles)
- Total land area: 822 square miles
--- #46 largest county in state, #1,031 nationwide
- Population density: 541.0 people / square mile (444,538 residents)
--- #48 lowest density county in state, #2,900 nationwide
- Rural area: 87.9% (1,621 square miles)
- Urban area: 12.1% (222 square miles)
- Total land area: 1,843 square miles
--- #26 largest county in state, #317 nationwide
- Population density: 458.8 people / square mile (845,599 residents)
--- #45 lowest density county in state, #2,862 nationwide
- Rural area: 88.8% (1,235 square miles)
- Urban area: 11.2% (156 square miles)
- Total land area: 1,391 square miles
--- #33 largest county in state, #434 nationwide
- Population density: 540.2 people / square mile (751,615 residents)
--- #47 lowest density county in state, #2,899 nationwide
- Rural area: 89.9% (1,265 square miles)
- Urban area: 10.1% (142 square miles)
- Total land area: 1,407 square miles
--- #32 largest county in state, #427 nationwide
- Population density: 278.5 people / square mile (391,799 residents)
--- #41 lowest density county in state, #2,710 nationwide
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- Rural area: 90.2% (6,497 square miles)
- Urban area: 9.8% (709 square miles)
- Total land area: 7,206 square miles
--- #4 largest county in state, #43 nationwide
- Population density: 338.3 people / square mile (2.4 million residents)
--- #43 lowest density county in state, #2,770 nationwide
- Rural area: 90.9% (1,432 square miles)
- Urban area: 9.1% (144 square miles)
- Total land area: 1,576 square miles
--- #29 largest county in state, #385 nationwide
- Population density: 315.3 people / square mile (496,801 residents)
--- #42 lowest density county in state, #2,751 nationwide
- Rural area: 92.0% (1,375 square miles)
- Urban area: 8.0% (120 square miles)
- Total land area: 1,495 square miles
--- #30 largest county in state, #402 nationwide
- Population density: 365.4 people / square mile (546,235 residents)
--- #44 lowest density county in state, #2,787 nationwide
- Rural area: 94.6% (708 square miles)
- Urban area: 5.5% (41 square miles)
- Total land area: 748 square miles
--- #48 largest county in state, #1,177 nationwide
- Population density: 185.2 people / square mile (138,572 residents)
--- #39 lowest density county in state, #2,566 nationwide
- Rural area: 94.8% (1,552 square miles)
- Urban area: 5.2% (84 square miles)
- Total land area: 1,636 square miles
--- #28 largest county in state, #370 nationwide
- Population density: 136.5 people / square mile (223,344 residents)
--- #34 lowest density county in state, #2,424 nationwide
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- Rural area: 95.1% (911 square miles)
- Urban area: 4.9% (47 square miles)
- Total land area: 958 square miles
--- #44 largest county in state, #732 nationwide
- Population density: 103.8 people / square mile (99,417 residents)
--- #27 lowest density county in state, #2,280 nationwide
- Rural area: 95.4% (968 square miles)
- Urban area: 4.6% (47 square miles)
- Total land area: 1,015 square miles
--- #41 largest county in state, #660 nationwide
- Population density: 215.6 people / square mile (218,774 residents)
--- #40 lowest density county in state, #2,619 nationwide
- Rural area: 95.6% (1,633 square miles)
- Urban area: 4.4% (75 square miles)
- Total land area: 1,708 square miles
--- #27 largest county in state, #351 nationwide
- Population density: 111.5 people / square mile (190,345 residents)
--- #31 lowest density county in state, #2,328 nationwide
- Rural area: 95.9% (578 square miles)
- Urban area: 4.1% (24 square miles)
- Total land area: 602 square miles
--- #53 largest county in state, #1,622 nationwide
- Population density: 159.9 people / square mile (96,315 residents)
--- #36 lowest density county in state, #2,501 nationwide
- Rural area: 96.1% (2,629 square miles)
- Urban area: 3.9% (106 square miles)
- Total land area: 2,735 square miles
--- #21 largest county in state, #190 nationwide
- Population density: 162.7 people / square mile (444,895 residents)
--- #37 lowest density county in state, #2,517 nationwide
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- Rural area: 96.4% (1,865 square miles)
- Urban area: 3.6% (70 square miles)
- Total land area: 1,935 square miles
--- #25 largest county in state, #293 nationwide
- Population density: 141.4 people / square mile (273,661 residents)
--- #35 lowest density county in state, #2,445 nationwide
- Rural area: 96.4% (5,744 square miles)
- Urban area: 3.6% (214 square miles)
- Total land area: 5,958 square miles
--- #6 largest county in state, #61 nationwide
- Population density: 166.2 people / square mile (990,204 residents)
--- #38 lowest density county in state, #2,528 nationwide
- Rural area: 96.8% (3,174 square miles)
- Urban area: 3.3% (107 square miles)
- Total land area: 3,281 square miles
--- #17 largest county in state, #157 nationwide
- Population density: 132.0 people / square mile (432,977 residents)
--- #33 lowest density county in state, #2,404 nationwide
- Rural area: 96.9% (19,431 square miles)
- Urban area: 3.1% (626 square miles)
- Total land area: 20,057 square miles
--- #1 largest county in state, #10 nationwide
- Population density: 107.8 people / square mile (2.2 million residents)
--- #28 lowest density county in state, #2,308 nationwide
- Rural area: 97.0% (3,201 square miles)
- Urban area: 3.0% (98 square miles)
- Total land area: 3,299 square miles
--- #16 largest county in state, #153 nationwide
- Population density: 85.6 people / square mile (282,517 residents)
--- #25 lowest density county in state, #2,140 nationwide
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- Rural area: 97.1% (613 square miles)
- Urban area: 2.9% (19 square miles)
- Total land area: 632 square miles
--- #52 largest county in state, #1,517 nationwide
- Population density: 122.7 people / square mile (77,524 residents)
--- #32 lowest density county in state, #2,373 nationwide
- Rural area: 97.2% (1,350 square miles)
- Urban area: 2.8% (39 square miles)
- Total land area: 1,389 square miles
--- #34 largest county in state, #436 nationwide
- Population density: 108.7 people / square mile (151,090 residents)
--- #29 lowest density county in state, #2,315 nationwide
- Rural area: 97.3% (7,912 square miles)
- Urban area: 2.7% (220 square miles)
- Total land area: 8,132 square miles
--- #3 largest county in state, #34 nationwide
- Population density: 109.7 people / square mile (892,458 residents)
--- #30 lowest density county in state, #2,321 nationwide
- Rural area: 97.7% (4,712 square miles)
- Urban area: 2.3% (112 square miles)
- Total land area: 4,824 square miles
--- #7 largest county in state, #85 nationwide
- Population density: 96.2 people / square mile (463,955 residents)
--- #26 lowest density county in state, #2,231 nationwide
- Rural area: 97.9% (1,230 square miles)
- Urban area: 2.1% (27 square miles)
- Total land area: 1,256 square miles
--- #38 largest county in state, #483 nationwide
- Population density: 51.2 people / square mile (64,276 residents)
--- #22 lowest density county in state, #1,712 nationwide
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- Rural area: 98.0% (3,699 square miles)
- Urban area: 2.0% (76 square miles)
- Total land area: 3,775 square miles
--- #13 largest county in state, #133 nationwide
- Population density: 47.5 people / square mile (179,267 residents)
--- #21 lowest density county in state, #1,638 nationwide
- Rural area: 98.2% (2,097 square miles)
- Urban area: 1.9% (40 square miles)
- Total land area: 2,137 square miles
--- #24 largest county in state, #260 nationwide
- Population density: 73.0 people / square mile (155,925 residents)
--- #24 lowest density county in state, #2,012 nationwide
- Rural area: 98.6% (2,190 square miles)
- Urban area: 1.4% (31 square miles)
- Total land area: 2,221 square miles
--- #23 largest county in state, #254 nationwide
- Population density: 24.4 people / square mile (54,147 residents)
--- #14 lowest density county in state, #1,048 nationwide
- Rural area: 98.7% (587 square miles)
- Urban area: 1.3% (8 square miles)
- Total land area: 595 square miles
--- #54 largest county in state, #1,644 nationwide
- Population density: 65.6 people / square mile (39,023 residents)
--- #23 lowest density county in state, #1,921 nationwide
- Rural area: 98.7% (3,522 square miles)
- Urban area: 1.3% (45 square miles)
- Total land area: 3,568 square miles
--- #14 largest county in state, #142 nationwide
- Population density: 38.1 people / square mile (136,101 residents)
--- #17 lowest density county in state, #1,428 nationwide
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- Rural area: 98.8% (994 square miles)
- Urban area: 1.2% (12 square miles)
- Total land area: 1,006 square miles
--- #42 largest county in state, #673 nationwide
- Population density: 27.5 people / square mile (27,692 residents)
--- #16 lowest density county in state, #1,136 nationwide
- Rural area: 99.0% (1,010 square miles)
- Urban area: 1.0% (10 square miles)
- Total land area: 1,020 square miles
--- #40 largest county in state, #650 nationwide
- Population density: 44.9 people / square mile (45,828 residents)
--- #20 lowest density county in state, #1,576 nationwide
- Rural area: 99.0% (4,134 square miles)
- Urban area: 1.0% (42 square miles)
- Total land area: 4,177 square miles
--- #10 largest county in state, #112 nationwide
- Population density: 43.2 people / square mile (180,580 residents)
--- #18 lowest density county in state, #1,543 nationwide
- Rural area: 99.2% (3,477 square miles)
- Urban area: 0.8% (29 square miles)
- Total land area: 3,506 square miles
--- #15 largest county in state, #143 nationwide
- Population density: 24.8 people / square mile (87,110 residents)
--- #15 lowest density county in state, #1,061 nationwide
- Rural area: 99.2% (1,377 square miles)
- Urban area: 0.8% (11 square miles)
- Total land area: 1,389 square miles
--- #35 largest county in state, #437 nationwide
- Population density: 44.3 people / square mile (61,547 residents)
--- #19 lowest density county in state, #1,559 nationwide
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- Rural area: 99.4% (1,305 square miles)
- Urban area: 0.6% (8 square miles)
- Total land area: 1,314 square miles
--- #36 largest county in state, #454 nationwide
- Population density: 21.4 people / square mile (28,060 residents)
--- #12 lowest density county in state, #936 nationwide
- Rural area: 99.5% (2,933 square miles)
- Urban area: 0.6% (16 square miles)
- Total land area: 2,950 square miles
--- #20 largest county in state, #176 nationwide
- Population density: 21.8 people / square mile (64,176 residents)
--- #13 lowest density county in state, #952 nationwide
- Rural area: 99.6% (1,146 square miles)
- Urban area: 0.4% (5 square miles)
- Total land area: 1,151 square miles
--- #39 largest county in state, #536 nationwide
- Population density: 18.7 people / square mile (21,491 residents)
--- #11 lowest density county in state, #842 nationwide
- Rural area: 99.8% (6,266 square miles)
- Urban area: 0.2% (12 square miles)
- Total land area: 6,278 square miles
--- #5 largest county in state, #54 nationwide
- Population density: 6.9 people / square mile (43,516 residents)
--- #8 lowest density county in state, #453 nationwide
- Rural area: 99.9% (2,549 square miles)
- Urban area: 0.1% (4 square miles)
- Total land area: 2,553 square miles
--- #22 largest county in state, #214 nationwide
- Population density: 7.4 people / square mile (18,844 residents)
--- #9 lowest density county in state, #467 nationwide
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- Rural area: 99.9% (4,536 square miles)
- Urban area: 0.1% (5 square miles)
- Total land area: 4,541 square miles
--- #8 largest county in state, #97 nationwide
- Population density: 6.7 people / square mile (30,600 residents)
--- #7 lowest density county in state, #441 nationwide
- Rural area: 99.9% (3,046 square miles)
- Urban area: 0.1% (3 square miles)
- Total land area: 3,049 square miles
--- #19 largest county in state, #170 nationwide
- Population density: 4.7 people / square mile (14,395 residents)
--- #6 lowest density county in state, #359 nationwide
- Rural area: 100.0% (3,916 square miles)
- Urban area: 0.1% (2 square miles)
- Total land area: 3,918 square miles
--- #12 largest county in state, #127 nationwide
- Population density: 2.3 people / square mile (8,853 residents)
--- #3 lowest density county in state, #178 nationwide
- Rural area: 100.0% (10,177 square miles)
- Urban area: 0.0% (4 square miles)
- Total land area: 10,181 square miles
--- #2 largest county in state, #22 nationwide
- Population density: 1.8 people / square mile (17,930 residents)
--- #2 lowest density county in state, #134 nationwide
- Rural area: 100.0% (1,449 square miles)
- Urban area: 0.0% (0 square miles)
- Total land area: 1,449 square miles
--- #31 largest county in state, #414 nationwide
- Population density: 12.0 people / square mile (17,319 residents)
--- #10 lowest density county in state, #636 nationwide
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- Rural area: 100.0% (3,179 square miles)
- Urban area: 0.0% (0 square miles)
- Total land area: 3,179 square miles
--- #18 largest county in state, #162 nationwide
- Population density: 3.9 people / square mile (12,541 residents)
--- #5 lowest density county in state, #306 nationwide
- Rural area: 100.0% (953 square miles)
- Urban area: 0.0% (0 square miles)
- Total land area: 953 square miles
--- #45 largest county in state, #735 nationwide
- Population density: 3.0 people / square mile (2,898 residents)
--- #4 lowest density county in state, #239 nationwide
- Rural area: 100.0% (738 square miles)
- Urban area: 0.0% (0 square miles)
- Total land area: 738 square miles
--- #50 largest county in state, #1,197 nationwide
- Population density: 1.6 people / square mile (1,159 residents)
--- #1 lowest density county in state, #115 nationwide
