| State | D | D | D | D | D | D | Total Vote | R | S | G | P | Margin |
%Margin | Romney | Santorum | Gingrich | Paul | Other | Romney | Santorum | Gingrich | Paul | Other |
| Alabama | 12 | 22 | 13 | 0 | 0 | 0 | 622,084 | 3 | 1 | 2 | 4 | 32,336 | 5.20% | 28.99% | 34.50% | 29.30% | 4.98% | 2.23% | 180,336 | 214,628 | 182,292 | 30,950 | 13,878 |
| Arizona | 29 | 0 | 0 | 0 | 0 | 0 | 510,258 | 1 | 2 | 3 | 4 | 101,136 | 19.82% | 46.87% | 27.05% | 16.02% | 8.61% | 1.44% | 239,167 | 138,031 | 81,748 | 43,952 | 7,360 |
| Arkansas | 33 | 0 | 0 | 0 | 0 | 0 | 152,360 | 1 | 3 | 4 | 2 | 83,801 | 55.00% | 68.39% | 13.33% | 4.89% | 13.39% | 0.00% | 104,200 | 20,308 | 7,453 | 20,399 | 0 |
| California | 169 | 0 | 0 | 0 | 0 | 0 | 1,935,658 | 1 | 3 | 4 | 2 | 1,331,267 | 68.78% | 79.07% | 5.28% | 3.72% | 10.29% | 1.63% | 1,530,513 | 102,258 | 72,022 | 199,246 | 31,619 |
| Connecticut | 25 | 0 | 0 | 0 | 0 | 0 | 59,578 | 1 | 4 | 3 | 2 | 32,139 | 53.94% | 67.43% | 6.83% | 10.30% | 13.48% | 1.96% | 40,171 | 4,072 | 6,135 | 8,032 | 1,168 |
| Delaware | 17 | 0 | 0 | 0 | 0 | 0 | 28,592 | 1 | 4 | 2 | 3 | 8,401 | 29.38% | 56.46% | 5.91% | 27.08% | 10.55% | 0.00% | 16,143 | 1,690 | 7,742 | 3,017 | 0 |
| D. C. | 16 | 0 | 0 | 0 | 0 | 0 | 5,104 | 1 | 0 | 3 | 2 | 2,956 | 57.92% | 70.08% | 0.00% | 10.93% | 12.17% | 6.82% | 3,577 | 0 | 558 | 621 | 348 |
| Florida | 50 | 0 | 0 | 0 | 0 | 0 | 1,672,634 | 1 | 3 | 2 | 4 | 242,038 | 14.47% | 46.40% | 13.35% | 31.93% | 7.02% | 1.29% | 776,159 | 223,249 | 534,121 | 117,461 | 21,644 |
| Georgia | 19 | 3 | 54 | 0 | 0 | 0 | 901,470 | 2 | 3 | 1 | 4 | 191,784 | 21.27% | 25.91% | 19.55% | 47.19% | 6.56% | 0.79% | 233,611 | 176,259 | 425,395 | 59,100 | 7,105 |
| Illinois | 42 | 12 | 0 | 0 | 0 | 0 | 933,454 | 1 | 2 | 4 | 3 | 109,081 | 11.69% | 46.69% | 35.01% | 7.98% | 9.32% | 1.00% | 435,859 | 326,778 | 74,482 | 87,044 | 9,291 |
| Indiana | 27 | 0 | 0 | 0 | 0 | 0 | 635,589 | 1 | 3 | 4 | 2 | 312,148 | 49.11% | 64.61% | 13.43% | 6.47% | 15.50% | 0.00% | 410,635 | 85,332 | 41,135 | 98,487 | 0 |
| Kentucky | 42 | 0 | 0 | 0 | 0 | 0 | 176,160 | 1 | 3 | 4 | 2 | 95,547 | 54.24% | 66.77% | 8.87% | 5.95% | 12.53% | 5.88% | 117,621 | 15,629 | 10,479 | 22,074 | 10,357 |
| Louisiana | 5 | 10 | 0 | 0 | 0 | 0 | 186,410 | 2 | 1 | 3 | 4 | 41,563 | 22.30% | 26.69% | 48.99% | 15.91% | 6.15% | 2.26% | 49,758 | 91,321 | 29,656 | 11,467 | 4,208 |
| Maryland | 37 | 0 | 0 | 0 | 0 | 0 | 248,468 | 1 | 2 | 3 | 4 | 51,051 | 20.55% | 49.26% | 28.72% | 10.96% | 9.50% | 1.56% | 122,400 | 71,349 | 27,240 | 23,609 | 3,870 |
| Massachusetts | 38 | 0 | 0 | 0 | 0 | 0 | 369,617 | 1 | 2 | 4 | 3 | 221,749 | 59.99% | 72.05% | 12.06% | 4.60% | 9.53% | 1.77% | 266,313 | 44,564 | 16,991 | 35,219 | 6,530 |
| Michigan | 16 | 14 | 0 | 0 | 0 | 0 | 996,499 | 1 | 2 | 4 | 3 | 32,150 | 3.23% | 41.10% | 37.87% | 6.53% | 11.63% | 2.88% | 409,522 | 377,372 | 65,027 | 115,911 | 28,667 |
| Mississippi | 12 | 13 | 12 | 0 | 0 | 0 | 294,112 | 3 | 1 | 2 | 4 | 4,646 | 1.58% | 30.66% | 32.73% | 31.15% | 4.40% | 1.06% | 90,161 | 96,258 | 91,612 | 12,955 | 3,126 |
| Missouri | 0 | 0 | 0 | 0 | 0 | 0 | 252,185 | 2 | 1 | 0 | 3 | 75,390 | 29.89% | 25.33% | 55.23% | 0.00% | 12.15% | 7.29% | 63,882 | 139,272 | 0 | 30,647 | 18,384 |
| Montana | 0 | 0 | 0 | 0 | 0 | 0 | 140,457 | 1 | 3 | 4 | 2 | 75,894 | 54.03% | 68.43% | 8.93% | 4.35% | 14.40% | 3.88% | 96,121 | 12,546 | 6,107 | 20,227 | 5,456 |
| Nebraska | 0 | 0 | 0 | 0 | 0 | 0 | 186,544 | 1 | 2 | 4 | 3 | 105,606 | 56.61% | 70.46% | 13.85% | 5.16% | 9.92% | 0.61% | 131,436 | 25,830 | 9,628 | 18,508 | 1,142 |
| New Hampshire | 7 | 0 | 0 | 3 | 2 | 0 | 248,475 | 1 | 4 | 5 | 2 | 40,719 | 16.39% | 39.28% | 9.43% | 9.43% | 22.89% | 18.98% | 97,591 | 23,432 | 23,421 | 56,872 | 47,159 |
| New Jersey | 50 | 0 | 0 | 0 | 0 | 0 | 232,116 | 1 | 3 | 4 | 2 | 164,104 | 70.70% | 81.05% | 5.22% | 3.11% | 10.35% | 0.28% | 188,121 | 12,115 | 7,212 | 24,017 | 651 |
| New Mexico | 20 | 0 | 0 | 0 | 0 | 0 | 90,113 | 1 | 2 | 4 | 3 | 56,418 | 62.61% | 73.17% | 10.56% | 5.88% | 10.39% | 0.00% | 65,935 | 9,517 | 5,298 | 9,363 | 0 |
| New York | 92 | 0 | 0 | 0 | 0 | 0 | 189,599 | 1 | 4 | 3 | 2 | 91,213 | 48.11% | 62.72% | 10.02% | 12.65% | 14.61% | 0.00% | 118,912 | 18,997 | 23,990 | 27,699 | 1 |
| North Carolina | 36 | 6 | 4 | 6 | 0 | 0 | 973,206 | 1 | 3 | 4 | 2 | 530,384 | 54.50% | 65.62% | 10.39% | 7.64% | 11.12% | 5.23% | 638,601 | 101,093 | 74,367 | 108,217 | 50,928 |
| Ohio | 38 | 25 | 0 | 0 | 0 | 0 | 1,213,879 | 1 | 2 | 3 | 4 | 12,251 | 1.01% | 37.96% | 36.95% | 14.60% | 9.33% | 1.16% | 460,831 | 448,580 | 177,183 | 113,256 | 14,029 |
| Oklahoma | 13 | 14 | 13 | 0 | 0 | 0 | 286,523 | 2 | 1 | 3 | 4 | 16,493 | 5.76% | 28.05% | 33.80% | 27.48% | 9.63% | 1.04% | 80,356 | 96,849 | 78,730 | 27,596 | 2,992 |
| Oregon | 18 | 3 | 1 | 3 | 0 | 0 | 287,955 | 1 | 3 | 4 | 2 | 167,366 | 58.12% | 70.91% | 9.39% | 5.37% | 12.78% | 1.55% | 204,176 | 27,042 | 15,451 | 36,810 | 4,476 |
| Pennsylvania | 0 | 0 | 0 | 0 | 0 | 0 | 811,706 | 1 | 2 | 4 | 3 | 319,318 | 39.34% | 57.70% | 18.36% | 10.41% | 13.08% | 0.44% | 468,374 | 149,056 | 84,537 | 106,148 | 3,591 |
| Rhode Island | 12 | 0 | 0 | 4 | 0 | 0 | 14,564 | 1 | 4 | 3 | 2 | 5,705 | 39.17% | 63.02% | 5.66% | 6.04% | 23.85% | 1.43% | 9,178 | 825 | 880 | 3,473 | 208 |
| South Carolina | 2 | 0 | 23 | 0 | 0 | 0 | 603,770 | 2 | 3 | 1 | 4 | 75,942 | 12.58% | 27.85% | 16.97% | 40.42% | 12.98% | 1.78% | 168,123 | 102,475 | 244,065 | 78,360 | 10,747 |
| South Dakota | 25 | 0 | 0 | 0 | 0 | 0 | 51,145 | 1 | 3 | 5 | 2 | 27,215 | 53.21% | 66.23% | 11.43% | 3.91% | 13.02% | 5.42% | 33,872 | 5,844 | 2,001 | 6,657 | 2,771 |
| Tennessee | 17 | 29 | 9 | 0 | 0 | 0 | 554,573 | 2 | 1 | 3 | 4 | 50,179 | 9.05% | 28.06% | 37.11% | 23.96% | 9.04% | 1.82% | 155,630 | 205,809 | 132,889 | 50,156 | 10,089 |
| Texas | 105 | 12 | 7 | 18 | 0 | 1 | 1,449,477 | 1 | 3 | 4 | 2 | 827,180 | 57.07% | 69.09% | 7.97% | 4.71% | 12.02% | 6.21% | 1,001,387 | 115,584 | 68,247 | 174,207 | 90,052 |
| Utah | 40 | 0 | 0 | 0 | 0 | 0 | 242,272 | 1 | 3 | 4 | 2 | 213,908 | 88.29% | 93.05% | 1.48% | 0.47% | 4.75% | 0.24% | 225,428 | 3,594 | 1,146 | 11,520 | 584 |
| Vermont | 9 | 4 | 0 | 4 | 0 | 0 | 60,850 | 1 | 3 | 4 | 2 | 8,617 | 14.16% | 39.45% | 23.61% | 8.13% | 25.29% | 3.51% | 24,008 | 14,368 | 4,949 | 15,391 | 2,134 |
| Virginia | 43 | 0 | 0 | 3 | 0 | 0 | 265,570 | 1 | 0 | 0 | 2 | 50,668 | 19.08% | 59.54% | 0.00% | 0.00% | 40.46% | 0.00% | 158,119 | 0 | 0 | 107,451 | 0 |
| West Virginia | 21 | 2 | 0 | 0 | 0 | 0 | 112,416 | 1 | 2 | 4 | 3 | 64,607 | 57.47% | 69.56% | 12.09% | 6.29% | 11.04% | 1.01% | 78,197 | 13,590 | 7,076 | 12,412 | 1,141 |
| Wisconsin | 33 | 9 | 0 | 0 | 0 | 0 | 787,847 | 1 | 2 | 4 | 3 | 56,737 | 7.20% | 44.03% | 36.83% | 5.84% | 11.15% | 2.16% | 346,876 | 290,139 | 45,978 | 87,858 | 16,996 |
| Puerto Rico | 20 | 0 | 0 | 0 | 0 | 0 | 125,024 | 1 | 2 | 3 | 4 | 95,678 | 76.53% | 84.89% | 8.36% | 2.02% | 1.25% | 3.47% | 106,133 | 10,455 | 2,528 | 1,568 | 4,340 |
| Total | 1190 | 178 | 136 | 41 | 2 | 1 | 18,908,313 | 1 | 2 | 3 | 4 | 6,131,323 | 32.43% | 52.61% | 20.18% | 14.23% | 10.67% | 2.31% | 9,947,433 | 3,816,110 | 2,689,771 | 2,017,957 | 437,042 |
| Enable | | | | | | |
|