| Rank |
County |
Percentage of Seniors |
| 1 |
Sierra County, California
|
23.7%
|
| 2 |
Calaveras County, California
|
23.3%
|
| 3 |
Amador County, California
|
23.0%
|
| 4 |
Mariposa County, California
|
23.0%
|
| 5 |
Plumas County, California
|
22.9%
|
| 6 |
Trinity County, California
|
22.0%
|
| 7 |
Tuolumne County, California
|
22.0%
|
| 8 |
Nevada County, California
|
21.5%
|
| 9 |
Modoc County, California
|
21.2%
|
| 10 |
Siskiyou County, California
|
21.1%
|
| 11 |
Inyo County, California
|
19.9%
|
| 12 |
Lake County, California
|
19.1%
|
| 13 |
Marin County, California
|
18.2%
|
| 14 |
Shasta County, California
|
18.1%
|
| 15 |
Alpine County, California
|
17.4%
|
| 16 |
Mendocino County, California
|
17.2%
|
| 17 |
Tehama County, California
|
16.8%
|
| 18 |
Placer County, California
|
16.6%
|
| 19 |
El Dorado County, California
|
16.4%
|
| 20 |
San Luis Obispo County, California
|
16.2%
|
| 21 |
Butte County, California
|
16.2%
|
| 22 |
Napa County, California
|
16.0%
|
| 23 |
Sonoma County, California
|
15.2%
|
| 24 |
Del Norte County, California
|
14.4%
|
| 25 |
Humboldt County, California
|
14.2%
|
| 26 |
San Francisco County, California
|
14.0%
|
| 27 |
San Mateo County, California
|
14.0%
|
| 28 |
Glenn County, California
|
14.0%
|
| 29 |
Sutter County, California
|
13.4%
|
| 30 |
Contra Costa County, California
|
13.3%
|
| 31 |
Santa Barbara County, California
|
13.3%
|
| 32 |
Ventura County, California
|
12.6%
|
| 33 |
Solano County, California
|
12.4%
|
| 34 |
Riverside County, California
|
12.4%
|
| 35 |
Orange County, California
|
12.3%
|
| 36 |
Santa Cruz County, California
|
12.2%
|
| 37 |
Colusa County, California
|
12.2%
|
| 38 |
Madera County, California
|
12.2%
|
| 39 |
San Diego County, California
|
12.0%
|
| 40 |
Sacramento County, California
|
11.9%
|
| 41 |
Alameda County, California
|
11.8%
|
| 42 |
Santa Clara County, California
|
11.6%
|
| 43 |
Los Angeles County, California
|
11.5%
|
| 44 |
Stanislaus County, California
|
11.3%
|
| 45 |
Monterey County, California
|
11.2%
|
| 46 |
San Joaquin County, California
|
11.0%
|
| 47 |
Lassen County, California
|
11.0%
|
| 48 |
Imperial County, California
|
11.0%
|
| 49 |
Yuba County, California
|
10.7%
|
| 50 |
Mono County, California
|
10.7%
|
| 51 |
Yolo County, California
|
10.6%
|
| 52 |
Fresno County, California
|
10.6%
|
| 53 |
San Benito County, California
|
10.4%
|
| 54 |
Merced County, California
|
9.9%
|
| 55 |
Tulare County, California
|
9.9%
|
| 56 |
San Bernardino County, California
|
9.6%
|
| 57 |
Kern County, California
|
9.4%
|
| 58 |
Kings County, California
|
8.5%
|