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DATA COVERAGE not externally verified tier raw_mirror vintage 2026-08-27 coverage 1980-2024 · 2026 Midterms in flight! money live · figures computing (best estimates)
Dollar figures are still computing and reflect best estimates while the corrected-financial reconciliation completes. Relationships, counts, and dates are final.

Winnebago County

county · 17201
This county — demographics, elections & registration at a glance full page ↗
Partisan lean · 189 precincts · IL D+2.5
Dem 64056 (50.2%) Rep 60861 (47.7%) Total 127709

RDH precinct returns aggregated to county (spatial assignment) · (Dem−Rep)÷total · 2020 presidential · counts, not dollars.

↑ IL state page County map See precincts on the map

Precincts

top 25 by turnout
PrecinctLeanDemRepTotal
Harlem 25 R+6.9 547 630 1211
Wd 14 Pct 01 D+34.5 725 345 1100
Harlem 2 R+9.8 469 576 1088
Rockford 32 D+7.3 552 475 1057
Harlem 15 R+15.4 431 592 1046
Rockton 1 R+12.0 437 559 1018
Harlem 1 R+0.1 495 496 1013
Harlem 22 R+13.3 413 543 977
Roscoe 9 R+15.9 399 554 976
Rockford 13 R+1.0 470 480 960
Harlem 21 R+16.2 388 542 949
Owen 1 R+21.3 358 557 936
Rockford 30 R+10.9 406 508 936
Wd 09 Pct 06 D+21.6 555 355 924
Roscoe 6 R+21.7 350 550 920
Cherry Valley 3 R+6.1 424 480 919
Pecatonica 4 R+30.4 309 587 914
Wd 02 Pct 04 D+9.9 494 404 912
Rockford 25 R+3.3 430 460 907
Rockford 14 D+4.0 465 429 906
Rockton 3 R+8.9 403 484 905
Wd 04 Pct 02 D+12.9 494 379 891
Wd 04 Pct 05 D+14.4 490 364 874
Roscoe 8 R+21.7 336 526 874
Harlem 17 R+18.0 350 507 872

Each precinct links to its own page · click a shape on the precinct map to zoom in.

Machine-readable: county-rollup?state_fips=17