| 2006 | 2007 | |||||||||||
| FIPS | County | Population estimate, women 15-44 | Population estimate, children 0-4 | Participants, Women | Participants, Children | Participants, Total | Population estimate, women 15-44 | Population estimate, children 0-4 | Participants, Women | Participants, Children | Participants, Total | |
| 19000 | State of Iowa | 585,349 | 194,044 | 2,849 | 6,651 | 9,500 | 582,948 | 195,916 | 2,951 | 6,878 | 9,829 | |
| 19001 | Adair | 1,293 | 367 | 9 | 21 | 29 | 1,255 | 378 | 9 | 21 | 30 | |
| 19003 | Adams | 655 | 209 | 4 | 11 | 15 | 645 | 220 | 4 | 9 | 13 | |
| 19005 | Allamakee | 2,452 | 960 | 7 | 19 | 26 | 2,431 | 980 | 13 | 29 | 41 | |
| 19007 | Appanoose | 2,388 | 799 | 14 | 35 | 49 | 2,305 | 786 | 15 | 34 | 49 | |
| 19009 | Audubon | 982 | 314 | 3 | 10 | 13 | 965 | 303 | 4 | 9 | 13 | |
| 19011 | Benton | 5,298 | 1,576 | 12 | 32 | 44 | 5,250 | 1553 | 11 | 29 | 39 | |
| 19013 | Black Hawk | 27,727 | 8,287 | 179 | 373 | 552 | 27,526 | 8357 | 184 | 394 | 578 | |
| 19015 | Boone | 5,095 | 1,521 | 16 | 43 | 58 | 5,025 | 1560 | 14 | 38 | 53 | |
| 19017 | Bremer | 4,731 | 1,292 | 10 | 25 | 35 | 4,747 | 1335 | 9 | 24 | 33 | |
| 19019 | Buchanan | 3,908 | 1,510 | 15 | 34 | 48 | 3,895 | 1521 | 14 | 35 | 49 | |
| 19021 | Buena Vista | 3,461 | 1,301 | 29 | 76 | 106 | 3,428 | 1309 | 31 | 75 | 107 | |
| 19023 | Butler | 2,424 | 816 | 5 | 13 | 18 | 2,397 | 839 | 5 | 11 | 16 | |
| 19025 | Calhoun | 1,497 | 477 | 6 | 14 | 20 | 1,439 | 480 | 5 | 13 | 17 | |
| 19027 | Carroll | 3,598 | 1,291 | 15 | 36 | 51 | 3,537 | 1309 | 15 | 36 | 50 | |
| 19029 | Cass | 2,276 | 770 | 15 | 35 | 49 | 2,245 | 792 | 14 | 34 | 48 | |
| 19031 | Cedar | 3,318 | 1,002 | 6 | 16 | 23 | 3,270 | 1010 | 7 | 18 | 24 | |
| 19033 | Cerro Gordo | 8,035 | 2,411 | 59 | 120 | 179 | 7,880 | 2403 | 62 | 125 | 187 | |
| 19035 | Cherokee | 1,839 | 557 | 12 | 28 | 39 | 1,757 | 566 | 12 | 30 | 42 | |
| 19037 | Chickasaw | 2,050 | 730 | 8 | 21 | 28 | 1,994 | 744 | 6 | 19 | 25 | |
| 19039 | Clarke | 1,661 | 626 | 12 | 29 | 41 | 1,624 | 625 | 14 | 30 | 44 | |
| 19041 | Clay | 2,960 | 1,001 | 20 | 48 | 68 | 2,912 | 1001 | 20 | 49 | 69 | |
| 19043 | Clayton | 3,003 | 995 | 13 | 30 | 43 | 2,939 | 1008 | 15 | 31 | 46 | |
| 19045 | Clinton | 9,139 | 2,982 | 50 | 111 | 162 | 8,965 | 2979 | 50 | 112 | 162 | |
| 19047 | Crawford | 2,920 | 1,196 | 28 | 70 | 98 | 2,892 | 1208 | 29 | 75 | 103 | |
| 19049 | Dallas | 12,592 | 3,859 | 31 | 80 | 111 | 13,325 | 4158 | 36 | 84 | 120 | |
| 19051 | Davis | 1,506 | 616 | 4 | 10 | 14 | 1,528 | 632 | 4 | 10 | 14 | |
| 19053 | Decatur | 1,745 | 469 | 10 | 28 | 38 | 1,727 | 489 | 12 | 29 | 40 | |
| 19055 | Delaware | 3,194 | 998 | 9 | 23 | 31 | 3,163 | 1030 | 8 | 21 | 29 | |
| 19057 | Des Moines | 7,265 | 2,551 | 48 | 110 | 158 | 7,181 | 2595 | 51 | 119 | 171 | |
| 19059 | Dickinson | 2,762 | 839 | 8 | 20 | 28 | 2,716 | 850 | 8 | 20 | 28 | |
| 19061 | Dubuque | 17,860 | 5,983 | 81 | 189 | 270 | 17,866 | 6047 | 89 | 203 | 291 | |
| 19063 | Emmet | 1,820 | 673 | 13 | 27 | 40 | 1,779 | 681 | 12 | 30 | 42 | |
| 19065 | Fayette | 3,557 | 1,103 | 16 | 37 | 52 | 3,459 | 1094 | 14 | 37 | 51 | |
| 19067 | Floyd | 2,840 | 979 | 13 | 31 | 45 | 2,807 | 996 | 13 | 32 | 44 | |
| 19069 | Franklin | 1,718 | 611 | 11 | 27 | 37 | 1,733 | 625 | 12 | 31 | 42 | |
| 19071 | Fremont | 1,274 | 421 | 6 | 14 | 19 | 1,250 | 432 | 6 | 14 | 20 | |
| 19073 | Greene | 1,528 | 503 | 9 | 21 | 30 | 1,510 | 515 | 8 | 21 | 29 | |
| 19075 | Grundy | 2,130 | 624 | 4 | 11 | 15 | 2,082 | 614 | 3 | 9 | 12 | |
| 19077 | Guthrie | 1,898 | 657 | 5 | 13 | 18 | 1,880 | 645 | 5 | 12 | 17 | |
| 19079 | Hamilton | 2,837 | 911 | 16 | 34 | 50 | 2,738 | 898 | 16 | 35 | 51 | |
| 19081 | Hancock | 1,990 | 612 | 6 | 15 | 20 | 1,917 | 604 | 6 | 16 | 22 | |
| 19083 | Hardin | 2,890 | 997 | 15 | 36 | 51 | 2,859 | 992 | 14 | 37 | 51 | |
| 19085 | Harrison | 2,810 | 841 | 9 | 23 | 33 | 2,788 | 846 | 10 | 22 | 33 | |
| 19087 | Henry | 3,699 | 1,146 | 14 | 36 | 51 | 3,649 | 1151 | 16 | 38 | 54 | |
| 19089 | Howard | 1,611 | 571 | 8 | 17 | 25 | 1,597 | 564 | 8 | 17 | 25 | |
| 19091 | Humboldt | 1,589 | 611 | 11 | 26 | 36 | 1,530 | 597 | 10 | 25 | 35 | |
| 19093 | Ida | 1,113 | 397 | 8 | 20 | 28 | 1,086 | 397 | 7 | 19 | 25 | |
| 19095 | Iowa | 2,971 | 971 | 8 | 21 | 29 | 2,909 | 977 | 8 | 21 | 28 | |
| 19097 | Jackson | 3,562 | 1,063 | 13 | 32 | 45 | 3,519 | 1059 | 14 | 34 | 48 | |
| 19099 | Jasper | 6,513 | 2,176 | 28 | 69 | 97 | 6,410 | 2134 | 27 | 66 | 93 | |
| 19101 | Jefferson | 2,690 | 747 | 12 | 33 | 45 | 2,653 | 769 | 12 | 30 | 42 | |
| 19103 | Johnson | 33,120 | 7,675 | 86 | 193 | 279 | 33,388 | 7836 | 91 | 205 | 295 | |
| 19105 | Jones | 3,498 | 1,076 | 11 | 27 | 38 | 3,508 | 1118 | 11 | 27 | 38 | |
| 19107 | Keokuk | 1,854 | 639 | 6 | 14 | 20 | 1,838 | 645 | 5 | 13 | 18 | |
| 19109 | Kossuth | 2,458 | 817 | 8 | 25 | 33 | 2,394 | 816 | 10 | 25 | 34 | |
| 19111 | Lee | 6,211 | 2,029 | 35 | 82 | 117 | 6,078 | 2036 | 35 | 84 | 119 | |
| 19113 | Linn | 42,187 | 14,121 | 171 | 404 | 575 | 42,618 | 14283 | 182 | 430 | 613 | |
| 19115 | Louisa | 2,266 | 762 | 12 | 31 | 43 | 2,253 | 740 | 13 | 33 | 46 | |
| 19117 | Lucas | 1,754 | 550 | 12 | 28 | 40 | 1,740 | 538 | 12 | 31 | 42 | |
| 19119 | Lyon | 1,978 | 786 | 7 | 18 | 25 | 1,914 | 785 | 7 | 18 | 25 | |
| 19121 | Madison | 2,933 | 1,023 | 12 | 29 | 40 | 2,978 | 1034 | 12 | 26 | 38 | |
| 19123 | Mahaska | 4,141 | 1,407 | 24 | 54 | 78 | 4,101 | 1428 | 25 | 59 | 84 | |
| 19125 | Marion | 6,453 | 2,061 | 27 | 66 | 93 | 6,421 | 2074 | 26 | 67 | 94 | |
| 19127 | Marshall | 6,697 | 2,906 | 79 | 175 | 254 | 6,650 | 3017 | 80 | 183 | 263 | |
| 19129 | Mills | 2,861 | 952 | 9 | 22 | 31 | 2,862 | 952 | 9 | 22 | 30 | |
| 19131 | Mitchell | 1,785 | 644 | 5 | 13 | 18 | 1,770 | 637 | 5 | 11 | 16 | |
| 19133 | Monona | 1,409 | 502 | 9 | 25 | 34 | 1,398 | 512 | 8 | 25 | 33 | |
| 19135 | Monroe | 1,311 | 413 | 8 | 18 | 26 | 1,289 | 417 | 8 | 20 | 28 | |
| 19137 | Montgomery | 1,935 | 659 | 14 | 34 | 47 | 1,834 | 643 | 14 | 33 | 47 | |
| 19139 | Muscatine | 8,206 | 3,100 | 62 | 143 | 205 | 8,195 | 3089 | 65 | 147 | 211 | |
| 19141 | O'Brien | 2,261 | 821 | 12 | 29 | 41 | 2,206 | 839 | 11 | 28 | 40 | |
| 19143 | Osceola | 1,111 | 377 | 4 | 11 | 16 | 1,069 | 370 | 4 | 10 | 14 | |
| 19145 | Page | 2,551 | 830 | 16 | 43 | 59 | 2,506 | 853 | 18 | 41 | 59 | |
| 19147 | Palo Alto | 1,617 | 542 | 9 | 21 | 30 | 1,622 | 552 | 8 | 18 | 27 | |
| 19149 | Plymouth | 4,374 | 1,549 | 13 | 33 | 47 | 4,308 | 1538 | 15 | 35 | 49 | |
| 19151 | Pocahontas | 1,162 | 364 | 6 | 13 | 18 | 1,152 | 370 | 5 | 14 | 19 | |
| 19153 | Polk | 87,403 | 32,718 | 386 | 856 | 1,242 | 87,952 | 33295 | 413 | 916 | 1,329 | |
| 19155 | Pottawattamie | 17,724 | 6,161 | 111 | 278 | 389 | 17,485 | 6135 | 113 | 282 | 394 | |
| 19157 | Poweshiek | 3,760 | 958 | 14 | 33 | 47 | 3,755 | 953 | 16 | 36 | 52 | |
| 19159 | Ringgold | 819 | 306 | 4 | 10 | 15 | 814 | 294 | 4 | 11 | 15 | |
| 19161 | Sac | 1,611 | 552 | 6 | 14 | 19 | 1,550 | 568 | 6 | 16 | 22 | |
| 19163 | Scott | 32,175 | 11,608 | 182 | 410 | 593 | 31,926 | 11576 | 193 | 432 | 625 | |
| 19165 | Shelby | 2,066 | 613 | 7 | 23 | 30 | 2,055 | 599 | 8 | 22 | 30 | |
| 19167 | Sioux | 6,710 | 2,342 | 33 | 85 | 118 | 6,691 | 2388 | 34 | 86 | 120 | |
| 19169 | Story | 21,471 | 4,534 | 64 | 134 | 198 | 21,530 | 4609 | 68 | 144 | 212 | |
| 19171 | Tama | 3,133 | 1,142 | 18 | 44 | 62 | 3,115 | 1156 | 17 | 42 | 59 | |
| 19173 | Taylor | 1,106 | 349 | 7 | 18 | 25 | 1,053 | 359 | 7 | 17 | 24 | |
| 19175 | Union | 2,182 | 734 | 19 | 44 | 62 | 2,153 | 767 | 18 | 43 | 61 | |
| 19177 | Van Buren | 1,317 | 452 | 4 | 10 | 14 | 1,307 | 447 | 4 | 11 | 15 | |
| 19179 | Wapello | 6,527 | 2,413 | 72 | 161 | 233 | 6,370 | 2410 | 78 | 165 | 243 | |
| 19181 | Warren | 9,123 | 2,620 | 26 | 68 | 94 | 9,234 | 2688 | 26 | 72 | 98 | |
| 19183 | Washington | 3,818 | 1,497 | 11 | 32 | 43 | 3,799 | 1473 | 12 | 32 | 44 | |
| 19185 | Wayne | 1,094 | 401 | 6 | 15 | 21 | 1,046 | 383 | 6 | 15 | 21 | |
| 19187 | Webster | 6,771 | 2,377 | 53 | 116 | 170 | 6,662 | 2363 | 55 | 123 | 178 | |
| 19189 | Winnebago | 1,956 | 574 | 8 | 24 | 32 | 1,917 | 549 | 8 | 20 | 28 | |
| 19191 | Winneshiek | 4,487 | 965 | 27 | 59 | 86 | 4,444 | 942 | 19 | 50 | 69 | |
| 19193 | Woodbury | 19,984 | 7,966 | 157 | 372 | 529 | 19,774 | 7955 | 162 | 384 | 546 | |
| 19195 | Worth | 1,305 | 402 | 2 | 4 | 6 | 1,300 | 408 | 2 | 5 | 7 | |
| 19197 | Wright | 2,000 | 836 | 18 | 42 | 59 | 1,940 | 820 | 19 | 43 | 62 | |
| Source Data: Iowa Department of Public Health and U.S. Census Bureau Population Estimates Program | ||||||||||||