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California Counties Land Area
Total=155,959.34 square miles (403,933 Square Kilometers)

County Land Area

County Area in Square Miles (Largest to Smallest)
1. San Bernardino 20,052.50
21. Santa Barbara 2,737.01
40. Calaveras 1,020.04
2. Inyo 10,203.10
22. Plumas 2,553.69
41. Yolo 1,013.27
3. Kern 8,140.96
23. Tuolumne 2,235.41
42. Del Norte 1,007.81
4. Riverside 7,207.37
24. Madera 2,135.86
43. Sacramento 965.65
5. Siskiyou 6,286.78
25. Merced 1,928.69
44. Nevada 957.61
6. Fresno 5,962.73
26. Ventura 1,845.30
45. Sierra 953.38
7. Tulare 4,823.97
27. El Dorado 1,710.85
46. Solano 829.19
8. Lassen 4,557.27
28. Butte 1,639.49
47. Orange 789.40
9. San Diego 4,199.89
29. Sonoma 1,575.88
48. Napa 753.73
10. Imperial 4,174.73
30. Stanislaus 1,493.79
49. Alpine 738.62
11. Los Angeles 4,060.87
31. Mariposa 1,451.12
50. Alameda 737.57
12. Modoc 3,944.10
32. Placer 1,404.37
51. Contra Costa 719.95
13. Shasta 3,785.19
33. San Joaquin 1,399.28
52. Yuba 630.69
14. Humboldt 3,572.49
34. Kings 1,390.99
53. Sutter 602.54
15. Mendocino 3,508.97
35. San Benito 1,389.06
54. Amador 592.97
16. Monterey 3,321.95
36. Glenn 1,314.79
55. Marin 519.80
17. San Luis Obispo 3,304.32
37. Santa Clara 1,290.69
56. San Mateo 449.07
18. Trinity 3,178.61
38. Lake 1,257.96
57. Santa Cruz 445.24
19. Mono 3,044.40
39. Colusa 1,150.68
58. San Francisco 46.69
20. Tehama 2,950.99
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County Area in Square Miles (Smallest to Largest)
1. San Francisco 46.69
21. Lake 1,257.96
40. Mono 3,044.40
2. Santa Cruz 445.24
22. Santa Clara 1,290.69
41. Trinity 3,178.61
3. San Mateo 449.07
23. Glenn 1,314.79
42. San Luis Obispo 3,304.32
4. Marin 519.80
24. San Benito 1,389.06
43. Monterey 3,321.95
5. Amador 592.97
25. Kings 1,390.99
44. Mendocino 3,508.97
6. Sutter 602.54
26. San Joaquin 1,399.28
45. Humboldt 3,572.49
7. Yuba 630.69
27. Placer 1,404.37
46. Shasta 3,785.19
8. Contra Costa 719.95
28. Mariposa 1,451.12
47. Modoc 3,944.10
9. Alameda 737.57
29. Stanislaus 1,493.79
48. Los Angeles 4,060.87
10. Alpine 738.62
30. Sonoma 1,575.88
49. Imperial 4,174.73
11. Napa 753.73
31. Butte 1,639.49
50. San Diego 4,199.89
12. Orange 789.40
32. El Dorado 1,710.85
51. Lassen 4,557.27
13. Solano 829.19
33. Ventura 1,845.30
52 .Tulare 4,823.97
14. Sierra 953.38
34. Merced 1,928.69
53. Fresno 5,962.73
15. Nevada 957.61
35. Madera 2,135.86
54. Siskiyou 6,286.78
16. Sacramento 965.65
36. Tuolumne 2,235.41
55. Riverside 7,207.37
17. Del Norte 1,007.81
37. Plumas 2,553.69
56. Kern 8,140.96
18. Yolo 1,013.27
38. Santa Barbara 2,737.01
57. Inyo 10,203.10
19. Calaveras 1,020.04
39. Tehama 2,950.99
58. San Bernardino 20,052.50
20. Colusa 1,150.68
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