RANKING · 2010 CENSUS · 58 SHOWN OF 58

Fastest shrinking, California counties · 2010

California counties with the steepest population decline from the 2000 census to 2010. This list covers the 58 counties in California that qualify, ranked against each other statewide.

Flip the list · Fastest growing, US counties →

CaliforniaAll states All rankings

SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Sierra County, CACA3,098-8.9%−224%

02Plumas County, CACA18,583-3.9%−171%

03Alpine County, CACA1,043-2.7%−132%

04Siskiyou County, CACA42,013+1.4%−24%

05Tuolumne County, CACA53,160+1.6%−87%

06San Mateo County, CACA743,568+1.6%−82%

07Mendocino County, CACA88,122+1.8%−75%

08Marin County, CACA253,694+2.1%−72%

09Modoc County, CACA8,426+2.5%−206%

10Santa Cruz County, CACA258,852+2.7%−76%

11Los Angeles County, CACA9,694,934+3.1%−58%

12Lassen County, CACA28,117+3.2%−86%

13Monterey County, CACA433,729+3.3%−74%

14Inyo County, CACA18,158+3.3%−282%

15San Francisco County, CACA826,079+3.7%−50%

16San Benito County, CACA70,082+3.8%−92%

17Del Norte County, CACA26,410+4.0%−77%

18Alameda County, CACA1,636,630+4.6%−64%

19Solano County, CACA455,376+4.8%−70%

20Sonoma County, CACA486,444+5.5%−70%

21Orange County, CACA3,149,507+5.8%−68%

22Trinity County, CACA15,720+5.9%−1969%

23Santa Clara County, CACA1,914,391+5.9%−52%

24Santa Barbara County, CACA442,065+6.1%−24%

25Glenn County, CACA28,141+6.3%−5%

26Humboldt County, CACA131,647+6.4%+3%

27Mariposa County, CACA16,918+6.5%−67%

28Nevada County, CACA101,911+7.3%−58%

29Butte County, CACA209,211+8.3%−28%

30Amador County, CACA41,876+8.5%−49%

31Shasta County, CACA181,648+8.6%−22%

32San Luis Obispo County, CACA282,367+9.3%−32%

33Ventura County, CACA830,851+9.3%−26%

34Napa County, CACA132,949+9.8%−20%

35San Diego County, CACA3,282,248+10.0%−21%

36Mono County, CACA12,505+10.5%−64%

37Contra Costa County, CACA1,170,070+10.6%−41%

38Lake County, CACA67,772+10.9%−28%

39Calaveras County, CACA46,605+12.4%−54%

40Tehama County, CACA64,665+13.2%+2%

41Colusa County, CACA21,836+13.9%−11%

42Stanislaus County, CACA557,719+15.1%−27%

43El Dorado County, CACA192,323+15.8%−34%

44Sacramento County, CACA1,618,460+16.0%−9%

45Fresno County, CACA1,035,456+16.4%−17%

46Kings County, CACA154,327+18.2%−34%

47San Bernardino County, CACA2,224,091+19.1%−7%

48Yolo County, CACA224,410+19.1%−2%

49Yuba County, CACA88,691+19.8%+480%

50Sutter County, CACA98,787+20.0%−11%

51Tulare County, CACA485,146+20.2%+12%

52Merced County, CACA297,260+21.5%+19%

53San Joaquin County, CACA823,815+21.6%+25%

54Madera County, CACA167,927+22.5%−43%

55Imperial County, CACA181,411+22.6%−25%

56Kern County, CACA927,068+26.9%+24%

57Placer County, CACA442,081+40.3%−8%

58Riverside County, CACA2,544,916+41.7%+30%

SHOWING 1–58 OF 58

Download CSV (full list, 58 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS