(CO-99-13) Population Estimates for Counties by Age Group: July 1, 1999 Source: Population Estimates Program, Population Division, U.S. Census Bureau, Washington, DC 20233 Contact: Demographic Call Center Staff, 1-866-758-1060 pop@census.gov (please include a phone number with email correspondence) Internet Release Date: August 30, 2000 Total Ages Ages Ages Ages Ages Ages Ages Ages Ages Area Name Population 0-4 5-17 18-24 25-44 45-64 16+ 21+ 65+ 85+ CALIFORNIA 33145121 2499258 6424165 3318684 10707327 6548155 25152040 22739131 3647532 424077 Alameda County 1415582 95250 249992 139323 487565 294383 1107313 1008398 149069 18443 Alpine County 1161 73 208 102 413 308 909 840 57 7 Amador County 34153 1500 5129 3031 9848 8470 28255 26010 6175 654 Butte County 195220 12381 36215 24041 51477 39289 151540 135437 31817 3692 Calaveras County 40051 2269 7630 1754 10517 10880 31212 29263 7001 598 Colusa County 18844 1503 4565 1526 5311 3779 13437 12026 2160 246 Contra Costa County 933141 61882 173144 72283 302253 216307 723231 664606 107272 11827 Del Norte County 26477 1739 5496 2235 8265 5422 19952 18331 3320 300 El Dorado County 161358 10599 32310 9672 51697 37011 122709 113612 20069 1656 Fresno County 763069 68924 178432 75375 226050 135518 539061 481575 78770 9579 Glenn County 26328 2146 6255 2005 7124 5329 18790 16976 3469 459 Humboldt County 121358 7660 23923 11985 37079 25280 92947 83823 15431 1785 Imperial County 145287 11945 36066 13846 43824 25386 102653 90614 14220 1292 Inyo County 17958 1013 3303 899 4910 4578 14092 13204 3255 453 Kern County 642495 57109 147675 59260 200582 117372 456656 410940 60497 5994 Kings County 123241 10327 26768 14054 43498 19684 89552 80872 8910 945 Lake County 55405 3412 10438 2844 14164 13578 42900 40157 10969 1023 Lassen County 33028 1678 5775 3932 12540 6220 26388 24144 2883 279 Los Angeles County 9329989 732928 1783697 1007744 3070750 1765898 7083151 6368301 968972 116239 Madera County 116760 8692 25779 11256 33761 22174 85783 76885 15098 1619 Marin County 236768 12010 32295 15580 81353 62896 197584 185844 32634 3994 Mariposa County 15605 835 2665 880 4188 4197 12486 11673 2840 264 Mendocino County 84085 5542 17671 5630 24933 18707 63353 58065 11602 1342 Merced County 200746 19852 51779 18502 57724 34913 135823 120584 17976 1851 Modoc County 9210 526 1979 491 2407 2200 6991 6454 1607 204 Mono County 10512 773 1804 975 4050 2158 8186 7553 752 63 Monterey County 371756 30965 76085 38780 120256 64875 275581 248072 40795 4779 Napa County 120962 7516 21314 9829 34745 27194 95221 87395 20364 2889 Nevada County 92014 4980 17400 4435 26132 22339 71956 67268 16728 1582 Orange County 2760948 201176 500749 302521 904185 573173 2139356 1927155 279144 35166 Placer County 239485 15479 48010 16056 74745 56453 182591 167859 28742 3324 Plumas County 20370 1149 4024 914 5437 5366 15718 14687 3480 304 Riverside County 1530653 130220 326773 136243 464577 284559 1116836 1010705 188281 19425 Sacramento County 1184586 85578 234223 107781 380914 240831 896684 817819 135259 14797 San Benito County 51276 4409 12303 4568 16054 9619 36238 32377 4323 506 San Bernardino County 1669934 151968 383821 159300 535345 293635 1184688 1061492 145865 15678 San Diego County 2820844 206459 518536 325305 919190 527934 2170575 1954483 323420 36280 San Francisco County 746777 33670 91004 67196 271194 169811 637452 597123 113902 15586 San Joaquin County 563183 47035 126838 51466 169504 107921 406889 365255 60419 7188 San Luis Obispo County 236953 13997 39872 30193 71525 45893 188762 168757 35473 3960 San Mateo County 702102 44480 111920 58562 232419 162377 562723 521090 92344 10569 Santa Barbara County 391071 27440 67987 50154 118394 75431 305549 271158 51665 6991 Santa Clara County 1647419 114081 289004 162231 566497 347886 1288061 1173072 167720 18825 Santa Cruz County 245201 16938 45027 27437 83875 46382 189859 169621 25542 3756 Shasta County 164530 11028 34545 11429 44826 38513 123912 113151 24189 2441 Sierra County 3334 204 666 138 882 848 2553 2394 596 72 Siskiyou County 43570 2516 9090 2498 11585 10357 33221 30597 7524 846 Solano County 385723 29561 82150 32876 130647 74639 285076 259041 35850 3352 Sonoma County 439970 29310 82672 35636 142998 92152 339441 310735 57202 7102 Stanislaus County 436790 37927 101649 37750 129982 83142 310491 279725 46340 5475 Sutter County 78423 5999 16838 6418 21927 17817 58000 52614 9424 985 Tehama County 54012 3652 11558 3492 13696 12984 40414 37097 8630 998 Trinity County 12927 735 2596 641 3575 3245 9976 9284 2135 185 Tulare County 358470 33056 91634 32172 100986 64991 245860 218149 35631 4079 Tuolumne County 53764 2637 9307 3684 16092 12527 43063 40210 9517 849 Ventura County 745063 55785 153026 69272 235993 152823 558753 503450 78164 8708 Yolo County 155573 10978 28695 25075 46425 28788 119844 103623 15612 1922 Yuba County 59607 5762 13856 5407 16442 11713 41743 37486 6427 650 The estimates presented here were produced by a method which is still in a developmental stage. They may not be accurate for populations which are very small or have unusual distributions. These figures should be used with caution.