Counties in California by median age

Name: Counties in California by median age, 2022
Creator: U.S. Census Bureau
License: Public domain (US federal government work, citation requested)

Sierra County had the highest median age of 58 counties in 2022, at 54.9 years. Tulare County had the lowest, at 31.5 years. The median was 39.1 years and the figure for California was 37.3 years. Source: the U.S. Census Bureau.

Highest54.9Sierra County

Lowest31.5Tulare County

Median39.158 counties

California37.3History

All counties, 2022

CSV Chart (SVG)

years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

Rank	Counties	2022 years	Change on 2021
1	Sierra County	54.9	+9
2	Trinity County	53.2	-0.7
3	Plumas County	52.3	+0.5
4	Calaveras County	52.1	-0.2
5	Mariposa County	51.6	0
6	Nevada County	50.2	+0.1
7	Amador County	49.6	-0.1
8	Tuolumne County	48.7	+0.1
9	Modoc County	47.5	-0.3
10	Marin County	47.4	+0.3
11	Siskiyou County	47.2	+0.1
12	El Dorado County	46.2	0
13	Inyo County	44.6	+0.1
14	Lake County	44.5	-0.1
15	Mendocino County	43.7	+0.1
16	Alpine County	43	-5.2
17	Sonoma County	42.7	+0.2
18	Napa County	42.5	+0.4
19	Placer County	42.3	+0.2
20	Shasta County	41.7	+0.2
21	Mono County	40.5	+0.2
22	San Mateo County	40.3	+0.3
22	Tehama County	40.3	+0.3
24	Contra Costa County	40.1	+0.2
25	Del Norte County	40	-0.1
25	San Luis Obispo County	40	+0.3
27	Humboldt County	39.5	+0.4
28	San Francisco County	39.3	+0.6
29	Santa Cruz County	39.2	+0.7
30	Ventura County	39	+0.3
31	Solano County	38.8	+0.3
32	Orange County	38.7	+0.2
33	Alameda County	38.4	+0.4
34	Santa Clara County	37.7	+0.2
35	Los Angeles County	37.4	+0.4
36	Lassen County	37.2	-0.1
37	Sacramento County	36.8	+0.2
38	San Diego County	36.7	+0.4
39	Butte County	36.5	-0.1
40	Riverside County	36.3	+0.3
41	Colusa County	36	+0.4
41	Sutter County	36	+0.2
43	Glenn County	35.8	+0.3
44	San Benito County	35.7	0
45	Monterey County	35.1	+0.2
46	San Joaquin County	34.8	+0.2
47	Stanislaus County	34.5	+0.1
48	Madera County	34.4	+0.1
49	Santa Barbara County	34.3	+0.4
50	San Bernardino County	33.9	+0.1
51	Yuba County	33.5	+0.3
52	Fresno County	32.8	+0.2
53	Imperial County	32.6	+0.1
54	Kern County	32.2	+0.1
55	Kings County	32.1	0
56	Yolo County	32	+0.5
57	Merced County	31.5	+0.2
57	Tulare County	31.5	+0.2

Other periods

2024
2023
2022
2021

About this ranking

Age that divides the resident population into two halves of equal size. Spain and the EU: on 1 January. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B01002: median age, total population. https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b01002.dat. Retrieved 2026-10-08.

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Questions

Which county has the highest median age?

Sierra County, with 54.9 years in 2022, according to the U.S. Census Bureau.

Which county has the lowest median age?

Tulare County, with 31.5 years in 2022.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B01002: median age, total population. Retrieved 2026-10-08.