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|Data for this Contest was Contributed by ClarkR on 2009-12-15|
|Charles H. Percy||Republican
|Paul H. Douglas||Democratic
|Other (+)|| -
|1970 Population:||11,110,285||Enum.||1970 Population Density:||77.2||persons/km2|
|1960 Population:||10,081,158||Enum.||1960 Population Density:||70.0||persons/km2|
|Land Area (2000):||143,961||km2||Annual Pop Growth Rate:||1.0||%|
|Election Data and Statistics:|
- Source for Popular Vote data: Illinois Secretary of State, Comp, "Illinois U. S. Senate," Official Vote Cast at the General Election on November 8, 1966 (Springfield: Illinois Secretary of State, 1967)
- Source for Population data: U.S. Census Bureau.
|Results for and Individual County:|