| Township | 2020 | 2018 | 2016 | 2014 | 2012 | 2010 | 2008 | 2006 | 2004 | 2002 |
|---|
| Barrington | 78.68% | 64.22% | 76.83% | 54.26% | 76.13% | 58.77% | 77.93% | 59.46% | 80.21% | 53.62% |
| Berwyn | 65.47% | 49.16% | 68.79% | 40.04% | 62.72% | 40.63% | 66.89% | 44.74% | 67.36% | 44.63% |
| Bloom | 62.98% | 50.00% | 67.36% | 46.70% | 68.80% | 48.79% | 70.46% | 43.36% | 69.43% | 45.08% |
| Bremen | 66.21% | 50.90% | 68.27% | 46.81% | 68.27% | 48.52% | 71.38% | 44.96% | 70.80% | 45.87% |
| Calumet | 60.24% | 46.42% | 66.99% | 45.93% | 70.26% | 49.20% | 70.73% | 43.44% | 69.58% | 46.71% |
| Cicero | 57.68% | 42.19% | 62.63% | 32.11% | 54.61% | 34.49% | 59.66% | 41.40% | 59.57% | 45.13% |
| Elk Grove | 73.41% | 55.02% | 72.78% | 49.70% | 71.69% | 51.79% | 75.11% | 53.07% | 76.35% | 50.51% |
| Evanston | 75.56% | 68.71% | 80.44% | 58.36% | 77.75% | 60.19% | 76.16% | 52.97% | 76.55% | 51.67% |
| Hanover | 67.81% | 47.85% | 67.95% | 40.24% | 65.89% | 45.39% | 70.58% | 45.55% | 69.96% | 44.48% |
| Lemont | 78.40% | 58.81% | 73.70% | 54.51% | 73.13% | 60.49% | 76.65% | 54.60% | 77.52% | 58.15% |
| Leyden | 67.07% | 46.92% | 66.54% | 40.64% | 62.56% | 44.32% | 68.06% | 46.90% | 69.30% | 47.81% |
| Lyons | 72.69% | 56.89% | 72.93% | 52.39% | 71.40% | 54.70% | 74.47% | 52.95% | 75.97% | 53.84% |
| Maine | 73.50% | 54.76% | 72.29% | 49.07% | 68.66% | 50.24% | 71.67% | 51.43% | 74.86% | 52.90% |
| New Trier | 80.85% | 68.63% | 79.91% | 65.38% | 79.40% | 69.90% | 82.42% | 64.87% | 84.21% | 63.40% |
| Niles | 73.56% | 54.30% | 70.74% | 45.28% | 67.12% | 51.22% | 71.35% | 49.38% | 75.35% | 55.43% |
| Northfield | 79.19% | 64.87% | 77.31% | 57.29% | 75.01% | 61.69% | 78.36% | 60.59% | 79.78% | 57.39% |
| Norwood Park | 71.70% | 50.99% | 70.04% | 45.36% | 63.20% | 46.68% | 68.62% | 50.11% | 70.53% | 54.55% |
| Oak Park | 80.31% | 71.52% | 83.39% | 60.42% | 81.86% | 63.21% | 82.53% | 59.38% | 81.43% | 58.09% |
| Orland | 74.38% | 56.38% | 71.96% | 50.86% | 69.97% | 52.01% | 73.59% | 47.69% | 75.74% | 51.46% |
| Palatine | 75.07% | 60.22% | 75.20% | 52.36% | 74.12% | 55.61% | 77.11% | 52.98% | 77.82% | 49.71% |
| Palos | 71.82% | 54.61% | 70.74% | 51.19% | 68.72% | 53.46% | 72.60% | 51.99% | 75.24% | 52.91% |
| Proviso | 69.26% | 55.56% | 72.31% | 49.88% | 72.76% | 51.79% | 73.69% | 48.89% | 71.65% | 49.15% |
| Rich | 71.20% | 59.89% | 74.78% | 56.31% | 77.56% | 58.87% | 78.88% | 54.15% | 77.36% | 53.79% |
| River Forest | 80.69% | 69.06% | 79.11% | 59.52% | 79.26% | 65.51% | 81.73% | 59.66% | 84.00% | 61.09% |
| Riverside | 78.29% | 64.18% | 76.73% | 56.29% | 74.66% | 58.54% | 76.60% | 61.43% | 79.78% | 58.62% |
| Schaumburg | 72.13% | 53.99% | 71.69% | 46.84% | 70.02% | 48.86% | 73.31% | 46.32% | 74.38% | 44.96% |
| Stickney | 64.00% | 44.85% | 64.56% | 38.58% | 58.27% | 41.63% | 64.38% | 44.56% | 67.52% | 48.03% |
| Thornton | 61.04% | 48.92% | 67.95% | 47.37% | 70.63% | 49.66% | 71.73% | 44.16% | 70.85% | 48.57% |
| Wheeling | 76.57% | 60.46% | 75.45% | 53.39% | 74.40% | 57.02% | 77.10% | 54.13% | 78.69% | 53.01% |
| Worth | 68.70% | 52.84% | 69.61% | 49.20% | 67.82% | 50.57% | 71.78% | 50.18% | 73.47% | 52.88% |
| Total | 71.18% | 55.64% | 72.07% | 49.79% | 70.70% | 52.48% | 73.54% | 50.39% | 74.36% | 51.09% |
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