Government

Presidential elections results Year Republican Democrat 2012 48.7% 193,333 49.7% 197,411 2008 43.9% 183,626 54.7% 228,698 2004 54.4% 218,902 44.8% 180,097 2000 55.2% 201,037 41.9% 152,550 1996 50.7% 164,630 40.0% 129,709 1992 48.1% 178,271 30.9% 114,564 1988 69.4% 217,907 30.0% 94,285 1984 75.7% 227,141 23.8% 71,430 1980 64.0% 182,308 24.2% 68,991 1976 68.8% 175,055 28.3% 72,137 1972 75.0% 172,341 24.8% 57,043 1968 66.6% 124,893 25.9% 48,492 1964 59.9% 98,871 40.1% 66,229 1960 69.5% 101,014 30.4% 44,263

DuPage County has long been a stronghold of the Republican Party. However, the county supported Democrat Barack Obama, a resident of Chicago, in 2008 and 2012 (albeit narrowly in 2012). Obama was the first Democratic presidential nominee to win the county since Franklin Pierce in 1852; hence, the last time before Obama that any Republican did not win the county was before the Republican Party existed.

Townships by population

DuPage County has nine townships (listed in order of population, largest to smallest):

Downers Grove Township - 148,110 York Township - 124,553 Milton Township - 118,616 Lisle Township - 117,604 Bloomingdale Township - 111,709 Addison Township - 88,900 Naperville Township - 85,736 Wayne Township - 63,776 Winfield Township - 45,155