East Contra Costa News

Of the 1,161,643 people living in Contra Costa County, California in 2021, 50.8% (590,637) were women and 49.2% (571,006) were men, according to U.S. Census Bureau data obtained by East Contra Costa News.

Data showed the average age for women in Contra Costa County in 2021 was 41 years, higher than the national average of 40 for women.

According to census data, women aged 18 and over outnumbered men in the same age group by 4,528. Meanwhile, in the 65 and over group, there were 81,823 men and 102,208 women.

An agency of the U.S. Federal Statistical System, the Census Bureau is responsible for compiling statistical facts about the American people, places and economy. Data for this story was compiled from the bureau's American Community Survey. Information from the survey helps to determine how federal and state funds are distributed. These funds significantly influence community services, education, and infrastructure in areas like Contra Costa County.

Age Range (Years)	Sex	Population in 2021	Population in 2020	Population in 2019	Change 2020-2021	Change 2019-2020
Under 5	Female	31,603	31,823	31,954	-0.7%	-0.4%
Under 5	Male	32,730	33,141	33,495	-1.2%	-1.1%
5 to 9	Female	34,998	34,797	36,275	0.6%	-4.1%
5 to 9	Male	36,332	36,598	36,175	-0.7%	1.2%
10 to 14	Female	38,885	37,988	36,721	2.4%	3.5%
10 to 14	Male	40,614	38,956	39,793	4.3%	-2.1%
15 to 17	Female	23,627	22,918	22,856	3.1%	0.3%
15 to 17	Male	24,719	23,970	23,934	3.1%	0.2%
18 and 19	Female	13,091	12,825	12,806	2.1%	0.1%
18 and 19	Male	14,021	13,660	13,715	2.6%	-0.4%
20	Female	5,591	5,641	5,396	-0.9%	4.5%
20	Male	6,534	6,526	6,830	0.1%	-4.5%
21	Female	6,287	6,336	6,461	-0.8%	-1.9%
21	Male	7,031	6,204	6,453	13.3%	-3.9%
22 to 24	Female	20,596	20,660	21,170	-0.3%	-2.4%
22 to 24	Male	19,964	21,185	21,039	-5.8%	0.7%
25 to 29	Female	35,027	35,478	35,273	-1.3%	0.6%
25 to 29	Male	35,798	36,664	36,317	-2.4%	1%
30 to 34	Female	37,436	37,110	37,055	0.9%	0.1%
30 to 34	Male	37,006	36,710	36,630	0.8%	0.2%
35 to 39	Female	39,581	38,284	38,243	3.4%	0.1%
35 to 39	Male	40,228	37,830	36,957	6.3%	2.4%
40 to 44	Female	41,201	40,711	40,142	1.2%	1.4%
40 to 44	Male	38,670	37,924	37,785	2%	0.4%
45 to 49	Female	40,750	40,952	41,265	-0.5%	-0.8%
45 to 49	Male	39,684	39,272	39,616	1%	-0.9%
50 to 54	Female	41,098	41,273	41,923	-0.4%	-1.6%
50 to 54	Male	40,363	39,608	40,095	1.9%	-1.2%
55 to 59	Female	41,837	41,588	41,148	0.6%	1.1%
55 to 59	Male	40,238	39,640	39,085	1.5%	1.4%
60 and 61	Female	16,137	15,951	15,611	1.2%	2.2%
60 and 61	Male	14,841	13,938	14,081	6.5%	-1%
62 to 64	Female	20,684	20,552	20,909	0.6%	-1.7%
62 to 64	Male	20,410	19,497	19,161	4.7%	1.8%
65 and 66	Female	13,490	13,367	12,774	0.9%	4.6%
65 and 66	Male	11,782	11,071	11,153	6.4%	-0.7%
67 to 69	Female	19,585	19,660	18,974	-0.4%	3.6%
67 to 69	Male	15,986	15,843	15,750	0.9%	0.6%
70 to 74	Female	25,852	24,612	24,158	5%	1.9%
70 to 74	Male	22,977	21,763	20,423	5.6%	6.6%
75 to 79	Female	17,251	16,651	16,052	3.6%	3.7%
75 to 79	Male	13,828	13,546	13,489	2.1%	0.4%
80 to 84	Female	12,204	12,948	12,452	-5.7%	4%
80 to 84	Male	9,121	9,039	8,368	0.9%	8%
85 and over	Female	13,826	14,468	14,131	-4.4%	2.4%
85 and over	Male	8,129	8,610	8,158	-5.6%	5.5%

Source: US Census Bureau