Columns: City | Population | Registered voters | Democratic | Republican | D–R spread | Other | No party preference
Carlsbad | 102342 | 64.7% | 28.0% | 42.0% | -14.0% | 8.5% | 24.9% | Chula Vista | 236218 | 48.2% | 42.0% | 27.7% | +14.3% | 6.9% | 26.1% | Coronado | 19423 | 55.0% | 24.5% | 47.3% | -22.8% | 8.0% | 23.5% | Del Mar | 4175 | 77.2% | 34.2% | 34.7% | -0.5% | 7.4% | 26.7% | El Cajon | 98813 | 40.9% | 33.7% | 37.4% | -3.7% | 9.5% | 23.2% | Encinitas | 59223 | 67.8% | 35.1% | 32.8% | +2.3% | 9.0% | 26.4% | Escondido | 142573 | 41.8% | 28.3% | 42.4% | -14.1% | 9.3% | 23.7% | Imperial Beach | 26348 | 42.9% | 37.1% | 26.7% | +10.4% | 10.4% | 29.6% | La Mesa | 56722 | 58.3% | 37.9% | 32.5% | +5.4% | 9.8% | 23.6% | Lemon Grove | 25250 | 51.2% | 44.5% | 27.7% | +16.8% | 8.4% | 22.6% | National City | 58015 | 32.9% | 48.9% | 19.5% | +29.4% | 7.0% | 27.2% | Oceanside | 166139 | 50.5% | 31.6% | 37.8% | -6.2% | 9.2% | 25.1% | Poway | 47762 | 61.5% | 24.8% | 45.7% | -20.9% | 7.8% | 24.8% | San Diego | 1296437 | 52.6% | 40.2% | 27.0% | +13.2% | 8.2% | 27.7% | San Marcos | 80709 | 48.5% | 29.3% | 40.6% | -11.3% | 9.1% | 24.8% | Santee | 53302 | 59.2% | 27.0% | 43.9% | -16.9% | 9.7% | 23.2% | Solana Beach | 12864 | 68.0% | 32.4% | 37.1% | -4.7% | 7.4% | 26.0%