Seneca, IL politics & representatives
Seneca is represented in Congress by Senators Richard J. Durbin and Tammy Duckworth and Representatives Darin LaHood and Lauren Underwood. J. B. Pritzker is governor.
Who represents Seneca in Washington and in Illinois, with how to reach each office.
How LaSalle County voted in 2024
Official results for all of LaSalle County. Seneca's own results aren't published in a form we can match to the town exactly, so these are the county's.
President 52,764 votes
Illinois: Harris 54.4%, Trump 43.5%
U.S. House · Illinois's 16th District 318,547 votes
Covers about 67% of Seneca · whole-district result
U.S. House · Illinois's 14th District 333,409 votes
Covers about 34% of Seneca · whole-district result
Source: MIT Election Data + Science Lab, official 2024 precinct returns (statewide totals from its official state files). Percentages are of votes for candidates; blank and spoiled ballots aren't counted.
Who represents Seneca in Congress
U.S. Senate Both senators represent all of Illinois
U.S. House · Illinois's 16th District Covers about 67% of Seneca
U.S. House · Illinois's 14th District Covers about 34% of Seneca
Seneca is split between 2 congressional districts. Find yours by ZIP code ↗
Who represents Seneca in state government
State Senate · District 38 Covers about 63% of Seneca
State Senate · District 53 Covers about 37% of Seneca
State House · District 75 Covers about 63% of Seneca
State House · District 106 Covers about 37% of Seneca
Seneca is split between state legislative districts. Find yours by address ↗
Seneca's own government: Town Hall →
Sources: congressional and state legislative districts from the U.S. Census Bureau (119th Congress, 2024 state districts); members of Congress from the congress-legislators project (portraits public domain); governors and state legislators from Open States. Districts are matched to Seneca by land area, so if the town is split, your street decides which one is yours.