(CO-99-13) Population of Counties by Age Group: April 1, 1990 Source: Population Estimates Program, Population Division, U.S. Census Bureau, Washington, DC 20233 Contact: Statistical Information Staff, Population Division, U.S. Census Bureau (301-457-2422) pop@census.gov (please include a phone number with email correspondence) Internet Release Date: August 30, 2000 Area Name Total Ages Ages Ages Ages Ages Ages Ages Ages Ages Population 0-4 5-17 18-24 25-44 45-64 16+ 21+ 65+ 85+ CALIFORNIA 29811427 2479427 5350250 3464581 10299031 5103318 22766323 20547529 3114820 292470 Alameda County 1304347 102310 214972 147374 476290 227450 1018493 926686 135951 13608 Alpine County 1113 86 198 107 410 233 854 790 79 5 Amador County 30039 1517 4179 3088 9564 6398 24932 22935 5293 435 Butte County 182120 12751 30454 25239 51428 30934 143001 128010 31314 2807 Calaveras County 31998 2146 5813 1636 9206 7582 24836 23281 5615 371 Colusa County 16275 1376 3635 1472 4785 2938 11791 10592 2069 177 Contra Costa County 803731 62202 140727 73129 281733 158886 621074 569511 87054 7736 Del Norte County 23460 1785 4584 2138 7824 4107 17666 16281 3022 201 El Dorado County 125995 9530 23871 8647 44338 24785 95689 88601 14824 962 Fresno County 667479 64975 145604 75863 207147 105116 476470 425000 68774 6754 Glenn County 24798 2158 5442 2117 7189 4435 17953 16262 3457 350 Humboldt County 119118 8777 21931 13319 39754 20770 91245 82274 14567 1296 Imperial County 109303 10271 27415 11106 31321 18218 75727 66421 10972 784 Inyo County 18281 1231 3238 1039 5359 4061 14242 13344 3353 341 Kern County 544981 53980 117907 56185 176976 87620 388416 349166 52313 4048 Kings County 101469 9672 21223 12952 35636 14202 73346 65776 7784 644 Lake County 50631 3515 8653 2895 13622 10558 39559 37163 11388 795 Lassen County 27598 1826 5043 3179 10032 4696 21428 19499 2822 209 Los Angeles County 8863052 762672 1585581 1105730 3077253 1479349 6760389 6065998 852467 83112 Madera County 88090 7621 19905 8096 25922 15855 63330 56743 10691 907 Marin County 230096 13950 30300 17775 86947 53118 190564 178934 28006 2758 Mariposa County 14302 913 2352 948 4237 3362 11364 10607 2490 175 Mendocino County 80345 6072 16016 6113 25783 15529 60470 55427 10832 957 Merced County 178403 18796 42260 19485 54311 27178 122935 109051 16373 1318 Modoc County 9678 644 1998 600 2767 2047 7312 6752 1622 147 Mono County 9956 834 1614 957 4201 1735 7728 7150 615 35 Monterey County 355660 32320 66422 47165 121165 54251 266279 237134 34337 3274 Napa County 110765 7599 18266 10285 34553 21789 87548 80255 18273 2121 Nevada County 78510 4998 14083 4392 24197 16630 61286 57265 14210 1062 Orange County 2410668 190389 404581 304464 857503 433941 1881154 1693237 219790 22696 Placer County 172796 12892 32518 13476 58865 34470 131801 121074 20575 1931 Plumas County 19739 1305 3740 1013 5768 4598 15169 14168 3315 212 Riverside County 1170413 107899 227707 116301 375274 189681 865224 785157 153551 12553 Sacramento County 1066789 88735 195786 112820 374870 183366 808677 737394 111212 9681 San Benito County 36697 3326 8136 3685 11880 6065 26372 23599 3605 323 San Bernardino County 1418380 142150 299605 155912 483366 213349 1016409 910505 123998 10613 San Diego County 2498016 200371 414598 340976 874787 395432 1943033 1741886 271852 24595 San Francisco County 723959 37029 81191 77138 287114 137484 619376 579676 104003 11659 San Joaquin County 480628 43803 99459 50671 154187 79402 351103 315348 53106 5085 San Luis Obispo County 217162 14217 33638 31548 71088 36053 174109 155255 30618 2710 San Mateo County 649623 46337 97529 62993 232264 131178 520622 481219 79322 7356 Santa Barbara County 369608 27757 58832 54672 120374 62616 291721 258062 45357 4975 Santa Clara County 1497577 115318 246672 173325 559213 273854 1173311 1064792 129195 11891 Santa Cruz County 229734 16999 38158 28482 83443 36942 180263 161439 25710 2997 Shasta County 147036 11552 29054 11912 44553 29360 110531 100852 20605 1618 Sierra County 3318 236 637 155 978 722 2528 2372 590 53 Siskiyou County 43531 3009 8706 2865 12736 9119 32998 30364 7096 611 Solano County 339469 30359 67659 35316 123951 54600 250435 226515 27584 2068 Sonoma County 388222 29073 67346 35125 136106 68660 301039 276293 51912 5097 Stanislaus County 370522 34837 79065 36798 119060 60949 267065 240890 39813 3799 Sutter County 64409 5534 12982 6072 19598 12664 47751 43279 7559 637 Tehama County 49625 3733 9844 3658 13750 10340 37406 34415 8300 736 Trinity County 13063 912 2561 761 3982 2924 9957 9251 1923 124 Tulare County 311932 30212 73561 32094 92236 50290 218189 193664 33539 3058 Tuolumne County 48456 2847 8075 3757 15766 10023 38595 35995 7988 545 Ventura County 669016 55220 128966 72601 229807 119808 504084 452778 62614 5676 Yolo County 141212 10665 23607 26654 44947 21933 110220 94161 13406 1314 Yuba County 58234 6184 12351 6306 17615 9663 41254 36981 6115 468