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Population by Sex & Age
Los Angeles County

2020, 2010, 2000 & 1990 Census


Male, Female, Sex, Age Group

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Also see: Age Groups for Cities & Communities in Los Angeles County

2020 Census Estimates*

Percentage is within that population by sex.

Age Group All Female Male
Number Percent Number Percent Number Percent
Total Population 10,040,682 100.0% 4,949,565 100.0% 5,091,117 100.0%
Age Under 15 1,805,996 17.99% 881,478 17.81% 924,518 18.16%
Age 15-17 372,563 3.71% 182,429 3.69% 190,134 3.73%
Age 18-24 952,944 9.49% 472,551 9.55% 480,393 9.44%
Age Group All Female Male
Number Percent Number Percent Number Percent
Age 25-34 1,629,298 16.23% 798,184 16.13% 831,114 16.32%
Age 35-54 2,710,634 27.00% 1,359,961 27.48% 1,350,673 26.53%
Age 55-64 1,199,106 11.94% 620,413 12.53% 578,693 11.37%
Age 65+ 1,370,141 13.65% 776,101 15.68% 594,040 11.67%

* U.S. Census estimates based upon data and surveys collected by the American Community Survey over the preceding five-year period. These estimates are issued annually between full Dicennial Census counts conducted each decade.

2010 Census

Percentage is within that population by sex.

Age Group All Female Male
Number Percent Number Percent Number Percent
Total Population 9,818,605 100.0% 4,978,951 100.0% 4,839,654 100.0%
Age Under 15 1,958,328 19.95% 957,285 19.23% 1,001,043 20.68%
Age 15-17 443,880 4.52% 216,775 4.35% 227,105 4.69%
Age 18-24 1,062,538 10.82% 519,238 10.43% 543,300 11.23%
Age Group All Female Male
Number Percent Number Percent Number Percent
Age 25-34 1,475,731 15.03% 729,075 14.64% 746,656 15.43%
Age 35-54 2,799,273 28.51% 1,412,632 28.37% 1,386,641 28.65%
Age 55-64 1,013,156 10.32% 531,613 10.68% 481,543 9.95%
Age 65+ 1,065,699 10.85% 612,333 12.30% 453,366 9.37%

2000 Census

Percentage is within that population by sex.

Age Group All Female Male
Number Percent Number Percent Number Percent
Total Population 9,519,338 100.0% 4,825,408 100.0% 4,693,930 100.0%
Age Under 15 2,266,817 23.81% 1,105,355 22.91% 1,161,462 24.74%
Age 15-17 392,985 4.13% 189,159 3.92% 203,826 4.34%
Age 18-24 976,588 10.26% 478,653 9.92% 497,935 10.61%
Age Group All Female Male
Number Percent Number Percent Number Percent
Age 25-34 1,562,471 16.41% 770,813 15.97% 791,658 16.87%
Age 35-54 2,708,010 28.45% 1,372,750 28.45% 1,335,260 28.45%
Age 55-64 685,497 7.20% 363,171 7.53% 322,326 6.87%
Age 65+ 926,970 9.74% 545,507 11.30% 381,463 8.13%

1990 Census

Percentage is within that population by sex.

Age Group All Female Male
Number Percent Number Percent Number Percent
Total Population 8,863,164 100.0% 4,441,766 100.0% 4,421,398 100.0%
Age Under 15 1,969,332 22.22% 962,565 21.67% 1,006,767 22.77%
Age 15-17 356,778 4.03% 171,877 3.87% 184,901 4.18%
Age 18-24 1,089,036 12.29% 508,134 11.44% 580,902 13.14%
Age Group All Female Male
Number Percent Number Percent Number Percent
Age 25-34 1,757,799 19.83% 845,997 19.05% 911,802 20.62%
Age 35-54 2,182,024 24.62% 1,098,654 24.73% 1,083,370 24.50%
Age 55-64 647,608 7.31% 340,107 7.66% 307,501 6.95%
Age 65+ 860,587 9.71% 514,432 11.58% 346,155 7.83%

Source for all tables: U.S. Census Bureau