| County | Precincts | M. Bachmann (GOP)
| N. Gingrich (GOP)
| J. Huntsman (GOP)
| R. Paul (GOP)
| R. Perry (GOP)
| M. Romney (GOP)
| | Total | 1766/1774 | 6,046 5% | 16,163 13% | 739 1% | 26,036 21% | 12,557 10% | 29,805 25% | | Adair | 5/5 | 26 10% | 44 16% | 1 0% | 42 16% | 47 17% | 43 16% | | Adams | 11/11 | 9 5% | 24 13% | 0 0% | 55 30% | 14 8% | 32 18% | | Allamakee | 11/11 | 18 4% | 82 17% | 0 0% | 157 33% | 28 6% | 106 23% | | Appanoose | 13/13 | 25 5% | 72 15% | 1 0% | 85 17% | 90 18% | 67 14% | | Audubon | 4/4 | 17 8% | 32 14% | 0 0% | 41 18% | 31 14% | 48 22% | | Benton | 19/19 | 66 6% | 121 12% | 5 0% | 202 19% | 168 16% | 184 18% | | Black Hawk | 63/63 | 262 7% | 596 16% | 30 1% | 870 24% | 259 7% | 835 23% | | Boone | 16/16 | 98 8% | 156 12% | 5 0% | 263 21% | 178 14% | 217 17% | | Bremer | 16/16 | 57 6% | 98 10% | 14 1% | 194 21% | 105 11% | 249 27% | | Buchanan | 15/15 | 40 9% | 77 17% | 1 0% | 66 14% | 62 14% | 78 17% | | Buena Vista | 13/13 | 26 4% | 124 18% | 3 0% | 156 22% | 97 14% | 130 18% | | Butler | 12/12 | 41 7% | 71 13% | 4 1% | 99 18% | 87 16% | 92 17% | | Calhoun | 11/11 | 31 7% | 54 12% | 2 0% | 75 17% | 71 16% | 69 16% | | Carroll | 13/13 | 32 5% | 145 21% | 3 0% | 123 17% | 85 12% | 146 21% | | Cass | 13/13 | 32 5% | 147 22% | 2 0% | 116 17% | 66 10% | 141 21% | | Cedar | 11/11 | 34 5% | 84 12% | 4 1% | 188 26% | 67 9% | 165 23% | | Cerro Gordo | 25/26 | 92 6% | 235 15% | 5 0% | 296 19% | 169 11% | 406 26% | | Cherokee | 7/7 | 20 4% | 78 15% | 0 0% | 95 18% | 63 12% | 126 23% | | Chickasaw | 13/13 | 14 4% | 38 11% | 3 1% | 93 26% | 74 21% | 85 24% | | Clarke | 7/7 | 42 11% | 46 13% | 1 0% | 98 27% | 62 17% | 65 18% | | Clay | 13/13 | 40 5% | 137 19% | 4 1% | 150 21% | 75 10% | 149 20% | | Clayton | 14/14 | 28 5% | 70 12% | 1 0% | 198 33% | 81 13% | 116 19% | | Clinton | 30/30 | 62 4% | 151 11% | 9 1% | 295 21% | 73 5% | 437 32% | | Crawford | 15/15 | 22 5% | 84 19% | 1 0% | 72 16% | 64 14% | 100 22% | | Dallas | 27/27 | 196 5% | 600 14% | 15 0% | 683 16% | 506 12% | 1,442 33% | | Davis | 8/8 | 25 8% | 35 12% | 0 0% | 79 27% | 39 13% | 18 6% | | Decatur | 13/13 | 35 10% | 51 15% | 0 0% | 81 24% | 54 16% | 79 23% | | Delaware | 14/14 | 15 3% | 76 14% | 2 0% | 107 20% | 83 15% | 115 21% | | Des Moines | 19/19 | 79 6% | 187 14% | 6 0% | 261 19% | 121 9% | 308 23% | | Dickinson | 10/10 | 18 3% | 132 19% | 4 1% | 100 15% | 98 14% | 187 27% | | Dubuque | 39/39 | 28 1% | 268 10% | 16 1% | 665 25% | 189 7% | 826 32% | | Emmet | 10/11 | 43 18% | 26 11% | 0 0% | 35 15% | 38 16% | 33 14% | | Fayette | 25/25 | 50 7% | 129 18% | 4 1% | 134 19% | 82 12% | 136 19% | | Floyd | 9/9 | 34 7% | 56 11% | 1 0% | 89 17% | 31 6% | 119 23% | | Franklin | 13/14 | 32 7% | 78 17% | 0 0% | 96 21% | 50 11% | 77 17% | | Fremont | 8/8 | 36 15% | 41 17% | 2 1% | 33 14% | 15 6% | 59 24% | | Greene | 7/7 | 17 4% | 81 18% | 1 0% | 86 19% | 75 17% | 91 20% | | Grundy | 7/7 | 43 7% | 82 13% | 0 0% | 99 16% | 100 16% | 129 21% | | Guthrie | 8/8 | 39 7% | 68 12% | 1 0% | 112 20% | 106 18% | 107 19% | | Hamilton | 13/13 | 51 7% | 138 18% | 6 1% | 164 22% | 73 10% | 144 19% | | Hancock | 10/10 | 36 7% | 89 17% | 0 0% | 126 24% | 67 13% | 55 10% | | Hardin | 8/8 | 46 6% | 96 12% | 4 0% | 156 19% | 96 12% | 168 20% | | Harrison | 13/13 | 37 6% | 98 15% | 2 0% | 110 17% | 69 11% | 123 19% | | Henry | 9/9 | 43 6% | 97 13% | 0 0% | 147 20% | 55 7% | 170 23% | | Howard | 10/10 | 39 14% | 26 9% | 0 0% | 34 12% | 16 6% | 51 19% | | Humboldt | 11/11 | 36 8% | 39 9% | 0 0% | 78 18% | 49 12% | 64 15% | | Ida | 7/7 | 12 4% | 48 16% | 1 0% | 47 15% | 49 16% | 46 15% | | Iowa | 11/11 | 58 9% | 80 12% | 1 0% | 151 23% | 47 7% | 110 17% | | Jackson | 16/16 | 18 3% | 90 16% | 2 0% | 163 30% | 43 8% | 139 25% | | Jasper | 21/21 | 122 7% | 171 10% | 8 0% | 300 18% | 162 10% | 285 17% | | Jefferson | 12/12 | 32 4% | 88 10% | 7 1% | 408 49% | 48 6% | 101 12% | | Johnson | 57/57 | 121 3% | 464 10% | 52 1% | 1,446 31% | 247 5% | 1,603 34% | | Jones | 17/17 | 48 7% | 52 7% | 1 0% | 167 23% | 76 10% | 200 28% | | Keokuk | 16/16 | 37 9% | 60 14% | 0 0% | 89 21% | 47 11% | 80 19% | | Kossuth | 22/22 | 42 7% | 98 17% | 3 1% | 89 15% | 60 10% | 95 16% | | Lee | 18/22 | 12 2% | 113 19% | 3 0% | 177 29% | 37 6% | 135 22% | | Linn | 86/86 | 411 5% | 1,017 12% | 64 1% | 2,089 24% | 786 9% | 2,530 29% | | Louisa | 8/8 | 16 4% | 73 20% | 0 0% | 87 23% | 41 11% | 67 18% | | Lucas | 8/8 | 22 6% | 29 7% | 1 0% | 48 12% | 95 24% | 80 20% | | Lyon | 8/8 | 23 4% | 42 8% | 1 0% | 57 11% | 52 10% | 36 7% | | Madison | 10/10 | 54 6% | 144 15% | 5 1% | 221 23% | 154 16% | 170 17% | | Mahaska | 11/11 | 138 10% | 170 12% | 2 0% | 241 17% | 209 15% | 159 11% | | Marion | 17/17 | 117 7% | 159 9% | 5 0% | 326 19% | 333 19% | 228 13% | | Marshall | 19/19 | 95 6% | 296 18% | 7 0% | 315 19% | 235 14% | 365 22% | | Mills | 11/11 | 29 5% | 79 15% | 2 0% | 84 16% | 44 8% | 132 25% | | Mitchell | 14/14 | 16 5% | 86 26% | 3 1% | 96 29% | 17 5% | 44 13% | | Monona | 11/11 | 5 1% | 53 15% | 0 0% | 43 13% | 33 10% | 96 28% | | Monroe | 7/7 | 16 6% | 46 17% | 1 0% | 43 16% | 47 18% | 28 10% | | Montgomery | 7/7 | 20 5% | 39 10% | 0 0% | 52 14% | 56 15% | 95 25% | | Muscatine | 25/25 | 49 4% | 171 14% | 12 1% | 260 21% | 129 11% | 361 29% | | O'Brien | 9/9 | 29 5% | 57 10% | 3 1% | 105 18% | 73 12% | 56 10% | | Osceola | 9/9 | 20 7% | 30 11% | 2 1% | 78 28% | 17 6% | 48 17% | | Page | 11/11 | 41 7% | 105 18% | 5 1% | 95 16% | 50 9% | 129 22% | | Palo Alto | 10/10 | 12 4% | 52 19% | 1 0% | 53 19% | 38 14% | 48 17% | | Plymouth | 13/13 | 32 3% | 161 13% | 2 0% | 195 15% | 140 11% | 369 29% | | Pocahontas | 10/11 | 21 6% | 48 13% | 0 0% | 85 22% | 67 18% | 54 14% | | Polk | 183/183 | 900 4% | 2,800 13% | 169 1% | 4,926 23% | 2,036 9% | 6,216 28% | | Pottawattamie | 41/41 | 115 4% | 457 17% | 12 0% | 529 19% | 220 8% | 725 27% | | Poweshiek | 10/10 | 42 6% | 113 16% | 8 1% | 197 28% | 77 11% | 116 16% | | Ringgold | 7/7 | 5 3% | 35 19% | 1 1% | 23 13% | 28 15% | 26 14% | | Sac | 9/9 | 25 6% | 69 15% | 1 0% | 87 19% | 32 7% | 105 23% | | Scott | 63/63 | 166 3% | 825 14% | 57 1% | 1,168 20% | 296 5% | 2,005 34% | | Shelby | 9/9 | 85 17% | 39 8% | 0 0% | 108 22% | 46 9% | 63 13% | | Sioux | 19/19 | 82 4% | 160 8% | 9 0% | 279 13% | 297 14% | 299 14% | | Story | 43/43 | 139 3% | 542 13% | 51 1% | 1,088 26% | 439 10% | 1,098 26% | | Tama | 16/16 | 55 8% | 91 14% | 1 0% | 126 19% | 102 16% | 132 20% | | Taylor | 8/8 | 7 3% | 25 11% | 0 0% | 28 12% | 82 35% | 44 19% | | Union | 9/9 | 54 12% | 42 9% | 4 1% | 78 17% | 105 23% | 75 16% | | Van Buren | 8/8 | 33 9% | 46 13% | 1 0% | 112 31% | 24 7% | 48 13% | | Wapello | 21/21 | 74 9% | 152 18% | 3 0% | 196 23% | 119 14% | 103 12% | | Warren | 25/25 | 150 6% | 334 13% | 23 1% | 595 24% | 308 12% | 479 19% | | Washington | 10/10 | 51 5% | 128 13% | 0 0% | 277 29% | 113 12% | 168 18% | | Wayne | 4/4 | 23 9% | 22 8% | 2 1% | 45 17% | 61 23% | 37 14% | | Webster | 29/29 | 62 5% | 162 14% | 5 0% | 203 17% | 140 12% | 287 25% | | Winnebago | 11/11 | 41 10% | 68 16% | 5 1% | 55 13% | 22 5% | 69 16% | | Winneshiek | 14/14 | 19 3% | 169 25% | 8 1% | 174 25% | 34 5% | 149 22% | | Woodbury | 44/44 | 80 2% | 406 12% | 19 1% | 529 15% | 308 9% | 952 28% | | Worth | 9/9 | 18 10% | 30 16% | 3 2% | 31 16% | 26 14% | 34 18% | | Wright | 12/12 | 40 9% | 68 15% | 0 0% | 68 15% | 82 18% | 99 21% |
|