Mapping Early American Elections


15th Congress: Illinois 1818

Illinois elected one Democratic-Republican to the Fifteenth Congress.

Illinois used a statewide at-large system for electing members to Congress.

District Candidate Party Vote Percentage Elected
At-large John MacLean Democratic-Republican 1,996 50.2%
At-large Daniel P. Cook Democratic-Republican 1,982 49.8%

In most cases, only candidates who received more than 5 percent of the vote in a district are reported. Other candidates are reported as a group, but only if they in aggregate received more than 5 percent of the vote. In addition, percentages for each district may not add up to 100 percent due to rounding. The term Dissenting Republican includes various breakaway factions of the Democratic-Republican party.



Mapping Early American Elections is generously funded by the National Endowment for the Humanities and developed by the Roy Rosenzweig Center for History and New Media at George Mason University.

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